Yes — and if there's any kind of framework, lesson, or teachable idea living inside your book, you probably should. This is genuinely one of my favorite questions to answer, because it's exactly where my own business started.
That's the whole difference, and it's a bigger difference than it sounds. A book is a product — someone buys it, reads it, and (hopefully) loves it. A curriculum is an asset — it gets taught, again and again, to new groups, in new rooms, sometimes by people who've never even met you. It keeps working long after the initial sale.
I didn't set out to build a curriculum business. People kept asking for more than the book — teachers wanted lesson plans, parents wanted discussion guides, organizations wanted a workshop they could run with their staff. So I built what they were already asking for. That pattern shows up constantly with authors who have something to teach: the demand exists before the product does.
If any of that sounds like your book, don't wait for someone to ask you for it. Build it before they do — that's the difference between reacting to demand and creating an asset that keeps earning long after your book's first launch week.