Marketing Hidden, Forbidden & Off-Limits
How I created a sustained content campaign around a specialist book about secret bunkers, underground places and the stories hidden beneath our feet.
Publishing a book is only part of the job. Once it is available, readers still need a reason to discover it, understand what makes it interesting and decide that it is worth buying.
When I published Hidden, Forbidden & Off-Limits, I did not rely on a single release announcement and hope that people would notice it. Instead, I built a wider content campaign around the book, using its locations, stories, photographs and themes to create multiple opportunities for discovery.
The result was a campaign that extended well beyond launch day. Rather than repeatedly posting the same sales message, I was able to approach the book from several different angles, giving existing followers new reasons to engage with it while also creating evergreen articles capable of attracting readers through search.
The Book
Hidden, Forbidden & Off-Limits is based on my own adventures exploring secret bunkers, underground complexes and unusual places across Britain. These include the extensive and often legendary tunnels beneath Corsham in Wiltshire.
The book is not simply a collection of historical descriptions. It tells the story of the journeys themselves, including the situations I encountered, the people I met and the experience of entering places that are normally hidden from public view.
It also includes a bunker bucket list looking beyond Britain to some of the world's most fascinating underground sites. These include the Cheyenne Mountain Complex in Colorado, France's Maginot Line, the catacombs beneath Paris and Canada's impressively preserved Diefenbunker.
This combination of personal adventure, hidden history and unusual locations gave me plenty of material to work with when planning the marketing campaign.
The Marketing Challenge
The book covers a specialist subject, but one with several overlapping audiences. It could appeal to readers interested in bunkers, military history, urban exploration, underground architecture, abandoned places, local history, travel and unexplained stories.
The challenge was to reach those audiences without reducing every piece of promotion to a direct request to buy the book.
A single launch article would reach the people already following my work, but its impact would quickly fade. Social posts would have an even shorter lifespan. I therefore needed to create a campaign that could support the immediate launch while continuing to introduce the book to new readers afterwards.
Creating Multiple Reasons To Talk About The Book
The central idea behind the campaign was simple: every article needed to provide value in its own right while also offering a natural route into the book.
Some pieces focused directly on the publication. Others explored individual locations, expanded on subjects covered in the book or presented its material in a different format. This allowed me to keep mentioning the book without publishing the same promotional message repeatedly.
The campaign included the following standalone content:
Launch Content
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Steve Higgins Releases Hidden, Forbidden & Off-Limits
An advance teaser introducing the book and building awareness before publication. -
Out Now: Hidden, Forbidden & Off-Limits
A release-day article confirming that the book was available and explaining what readers could expect. -
Exploring The Hidden World Of Secret Bunkers & Underground Places
An interview exploring my interest in underground locations and the experiences behind the book.
Interviews And Podcast Coverage
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Bunker-Buster Matthew Williams Hosts Ultra-Geeky Underground Chat About Steve Higgins' New Book
A supporting article built around a promotional podcast conversation about bunkers and underground exploration. -
Steve Higgins Shares Some Underground Secrets On The Haunted History Chronicles Podcast
A second podcast write-up that gave the interview a permanent home and another route into the book.
Supporting And Evergreen Content
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Listen To The Hidden, Forbidden & Off-Limits Audiobook Available Now
A separate launch for the audiobook, creating another promotional moment after the initial publication. -
Visual Guide To Hidden, Forbidden & Off-Limits
An expanded guide to the photographs included in the book. -
The Secret Underground Places That Feature In Hidden, Forbidden & Off-Limits
A location-led article introducing some of the places readers would encounter. -
Corsham: You Won't Believe What's Hidden Beneath This Quaint English Town
A focused article about one of the book's most important locations. -
Dulce Base: The Secret Bunker That Doesn't Exist
A standalone article developed from one of the subjects explored in the book. -
The Hidden, Forbidden & Off-Limits Underground Quiz
An interactive piece designed to engage readers with the subject in a different way.
Building Anticipation Before Release
The campaign began before the book was available. The teaser article introduced the title, its subject and the story behind it, giving readers advance notice rather than presenting the finished book without warning.
This was followed by a dedicated release-day article. Separating the announcement into two stages meant there were already people familiar with the project by the time the buying link became available.
The release article could then focus on the finished product, including its format, contents and availability, rather than having to introduce the whole idea from the beginning.
Turning Interviews Into Permanent Content
Podcast appearances provided an opportunity to reach audiences beyond my own website, but the conversations themselves were only part of the value.
For each appearance, I also published a supporting article. These write-ups explained what had been discussed, highlighted the most interesting themes and directed readers towards both the interview and the book.
This gave the interviews a longer life. A podcast promotion might otherwise disappear down a social media feed, but a permanent article remains searchable, shareable and connected to the rest of the campaign.
Giving The Audiobook Its Own Launch
The audiobook was released approximately a month after the print and Kindle editions rather than being launched at exactly the same time.
This created a second meaningful announcement. Instead of combining every format into one promotional push, the later release gave me another reason to revisit the book and reach readers who prefer listening.
It also helped extend the launch period. The campaign did not disappear after a few days because another version of the book was still to come.
Using The Book As A Source Of New Content
Several articles were developed from subjects already covered in the book, but they were not simply extracts copied onto the website.
The Corsham article focused on the extraordinary underground history beneath an otherwise picturesque English town. The Dulce Base article explored a legendary secret facility with a very different tone and audience. The visual guide expanded on the photographs printed in the book, allowing readers to examine the locations in more detail.
Each piece could attract someone with a specific interest who might never have searched for the book by name. Once on the page, the reader could then discover that a larger exploration of the subject was available.
Adding An Interactive Element
The underground quiz gave the campaign something other than another article to read. It invited people to test their knowledge of bunkers and underground locations while introducing themes connected to the book.
Interactive content is particularly useful for social sharing because it asks the audience to take part. It also reaches people who may not initially respond to a conventional book advertisement.
Creating A Connected Content Network
The individual articles were most effective when treated as part of a connected network rather than isolated posts.
Each relevant page could link to the book, while the articles could also link to one another. Someone arriving through a search for Corsham's underground tunnels might continue to the visual guide, listen to a podcast interview and then visit the book page.
This approach created several routes towards the same destination:
- A direct search for the title
- An interest in a particular location
- A search for secret bunkers or underground places
- A podcast appearance
- A social media post
- The audiobook announcement
- The interactive quiz
Rather than asking one promotional page to do all the work, the campaign allowed readers to encounter the book through the aspect most relevant to them.
The Results
Hidden, Forbidden & Off-Limits became one of the stronger titles in my publishing catalogue, selling across Kindle, paperback and audiobook formats.
More importantly, the campaign created a lasting collection of supporting content. The launch announcements provided the initial sales push, while the location articles, interviews, visual guide and quiz continued to offer ways for readers to discover the book after the launch period had ended.
The book has now passed its initial sales peak, but it remains part of an active back catalogue rather than becoming a forgotten release. Its surrounding content continues to explain what it is, establish its subject matter and direct interested readers towards it.
What I Learned
The campaign reinforced the importance of looking beyond release day. A book launch can generate a short burst of attention, but specialist non-fiction often has a much longer potential lifespan.
The most useful lessons were:
- Start promoting before publication. A teaser gives the audience time to become familiar with the project.
- Do not put every announcement into one day. Different formats and milestones can create separate promotional moments.
- Give each piece of content its own purpose. Useful articles perform better than repeated sales messages.
- Build content around individual subjects. A reader may be interested in Corsham, Dulce Base or secret bunkers before they are interested in the book itself.
- Turn temporary publicity into permanent resources. Podcast appearances and interviews gain more value when supported by searchable articles.
- Create several routes to the same book. Search, social media, podcasts, quizzes and related articles can all reach different parts of the potential audience.
The aim was not simply to tell people that the book existed. It was to build a collection of interesting, relevant content that demonstrated why its subject was worth exploring.
Project
- Book
- Hidden, Forbidden & Off-Limits
- Author
- Steve Higgins
- Subject
- Secret bunkers and underground places
- Formats
- Kindle, paperback and audiobook
Services Used
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