How I Turned a Forgotten Blog Post Into a 90-Page Book in 5 Days (Using AI)
A step-by-step framework for turning your back catalogue into published work.
Welcome to ‘The Unretired Creator’. Every Wednesday I share ideas, stories and practical lessons for anyone who still feels called to create, contribute and build something meaningful, no matter their age. Because creativity never retires. 🎉
Recently I wrote a short post about practising brevity. Specifically about being someone who writes 25,000-word blog posts when 2,000 would do (or 2000 word posts when 500 would do!).
While writing it, I mentioned one of those old leviathans in passing. A 25,000-word blog post I’d written years ago about how to start a blog.
That’s a book, I thought, mid-sentence.
I scribbled it down as a note-to-self, finished the post, then immediately opened the old draft in Claude Cowork and started turning it into an actual book.
A 25,000-word blog post that’s been sitting quietly on my hard drive for years is now a 90-page book, waiting to go live.
And then I remembered something else.
A couple of years ago I recorded a video course. It’s been sitting ignored on my hard drive, completely unloved, since I finished it.
I immediately pulled the transcripts, dropped them into Cowork, and I’m now nearly finished turning that too into a book. Currently sitting at over 30,000 words.
Two books, from two things I’d already made, in under a week.
Earlier that same morning, I’d had a call with a lovely lady who’s recently started building on Substack (and is doing very well by the way). Halfway through our chat she suddenly went quiet and said, “Oh — I’ve got hours of podcast episodes from years ago. Could I just... upload them?”
Yes. Yes she could. And probably should.
She has a back catalogue. She just hadn’t seen it as one.
What Are You Sitting On?
Most of us have spent years making things.
Blog posts. Voice notes. Workshop recordings. Old courses. Half-finished drafts. Random documents. Podcast episodes. Webinars we ran once and forgot about. Email newsletters from a previous life.
Most of it is sitting on hard drives, in dusty Google Drive folders, on old blogs you haven’t logged into in five years, in voice memo apps you haven’t opened.
And almost all of it is more useful than you remember.
The trap most creators fall into is assuming the next valuable thing they make has to be made from scratch. New idea, new draft, new product, new everything. Meanwhile they’re standing on top of years of perfectly good material they’ve already created.
AI Has Made This Almost Too Easy
Two years ago, turning an old blog post into a book would have taken months of manual work. Turning an old video course into a book would have been almost impossible without paying someone to transcribe it and someone else to edit it.
Today, with AI tools like Claude Cowork, you can drop hours of transcripts, decades of blog posts, or a folder of half-finished drafts into a project, and get to a first-draft book or course in a matter of days.
I’m not exaggerating. I’ve done it twice this week.
The friction that used to stop us from repurposing old work has collapsed. Which means the biggest bottleneck now isn’t the work. It’s deciding what to look for and what to turn it into.
Which is exactly what I’m going to walk you through today.
How to Turn Your Half Finished Info Into a Sellable Asset
Below the paywall, I’ve put together a full step-by-step guide for turning something you’ve already made into a published book, course, guide, or digital product.
You’ll get:
Step 1 — how to audit what you’ve already created (with a checklist of every place to look)
Step 2 — how to sort your material into what’s usable, what’s mineable, and what’s not worth the effort
Step 3 — how to decide what form your material wants to become (book / course / guide / paid resource)
Step 4 — how to use Claude Cowork to do the heavy lifting, including the exact prompts I’ve used this week
Step 5 — the specific tools I’d use to actually publish each format
Step 6 — how to build a rhythm so your back catalogue keeps compounding into new work every quarter
It’s the exact process I’ve used this week to turn two dormant assets into two publishable books.
If you’re paying for this Substack (thank you 🙏), scroll on.
If you’re not, this is the kind of post you’ll find in the paid tier. Come and join us. It’s worth it.
