A children's book review blog
Honest reviews from a guy who has read The Very Hungry Caterpillar approximately one billion times.
← Back to all posts

I Built a Book Finder So You Never Get a Fourth Copy of The Very Hungry Caterpillar

Screenshot of the Book Finder tool on bookishdad.com showing the AI chat box and the catalog browser below it.
I called it "Book Finder." I know. I had "Oh, The Books You'll Find" right there and I went with Book Finder. I'm taking suggestions.

Picture it. Your kid is unwrapping a birthday gift from your great uncle Larry, the wrapping paper is in shreds, and there it is in their lap: another copy of The Very Hungry Caterpillar. That makes four. My son does not smile. He looks up at me and says, flatly, "Dad. We already have this one." And there is a specific flavor of parental embarrassment that lives in that exact moment, because you remember now — Larry texted you three weeks ago asking what the kids were reading and you meant to write back but the laundry pile was tall and the dishwasher was beeping and you forgot, and now here we are, on caterpillar number four, and my wife (who has read that book approximately one billion times) is making a face at me from across the room.

I've been there enough times that I finally did something about it. So: I'd like to introduce the Book Finder. It's a tool I built to help find good kids' books — for my own kids, for gifts, for the friend who just had a baby, for me when I'm staring at our bookshelves wondering what to bring into the rotation next.

What it actually is

I did not, it turns out, have a massive database of children's books sitting in my garage next to the Christmas decorations. What I did have was years of using OpenLibrary, which is a wonderful, free, slightly clunky-in-the-best-way public catalog of basically every book ever printed. From their database I pulled together 40,842 children's books — the award winners across the decades, the bestsellers, the classics that everyone already knows, and a healthy number of hidden gems that deserve more attention than they get. Each book has a rating pulled in from Goodreads so you can see how it's been received, and the cover images come from Google Books, which has the best library of cover art on the internet.

That part is just a catalog. You can browse it on the page and filter by age, format, topic, difficulty level — the usual stuff. Useful, but not magic.

The magic (or what I'm hoping feels like magic) is the search box at the top of the page. You type in what you're looking for in plain English, and it gives you back books that match. This part is powered by Claude, which is the AI made by a company called Anthropic. So if you type in "books for a kid who loves dinosaurs but gets scared easily," it doesn't just look for the word "dinosaur" — it actually understands what you're asking and pulls books from the catalog that fit. I'm not going to tell you what it returns because the fun is in trying it yourself, and also because the results shift a bit each time, which I think is part of the charm.

Some real searches I've run while testing it: "picture books for a 4-year-old who only wants to read the same thing every night" (felt personal). "Chapter books for an 8-year-old who just finished Magic Tree House and wants more." "A book with talking trucks that teaches kids about sharing." That last one — there is one. I am not making that up.

The boring-but-important stuff

I want to be upfront about a few things because I'd want someone to be upfront with me. The AI search costs real money to run every time someone uses it. So I've capped it at 5 searches per visit and 15 per day. That's plenty for figuring out what to bring home from the library, and not so much that I have to start a GoFundMe.

On privacy: when you type something into the search box, the only thing that gets sent to Claude is the words you typed plus a chunk of book information from my own catalog so it has something to work with. That's it. No account, no sign-in, no email, no tracking who you are or what you searched for last week. I'm not building a profile of you. I'm a dad with a blog. I genuinely do not want your data and I wouldn't know what to do with it if I had it.

If you find a book through the tool and want to buy it, every book card has a link to Bookshop.org, which I'm a proud affiliate of. Bookshop is the one that funnels money to independent and local bookstores instead of the giant warehouse in the sky. If you buy a book through one of those links I get a small cut, which helps keep this site (and the search tool) running. If a book has a gold ★ Reviewed badge on it, that means I've written a full review on the blog and the card links to my review instead — so you can read what I thought before you decide.

Who this is for

The parent who spent twenty minutes on Pinterest and came away with the same fifty books that were there six months ago — that's who this is for. The aunt who got a vague text that says "she's into space stuff right now" and has no idea where to take it from there. The friend dreading the baby shower because they don't want to show up with another copy of Goodnight Moon. Yourself, at 9:47pm, when the kids are finally asleep and you just remembered the birthday party is on Saturday.

It's also, honestly, for me. I built it because I needed it. I was tired of Googling "best chapter books for 8 year olds" and getting the same ten books recycled across a hundred different pages. Now I just open the thing and ask it what I actually want to know.

Big thank-yous owed here: to OpenLibrary for being one of the genuinely good corners of the internet, to Goodreads for the ratings, to Google Books for the covers, to Anthropic for the brain behind the search, and to Bookshop.org for existing at all. None of this would be possible without any of them, and I'd rather say that loudly than quietly.

Go give it a try: bookishdad.com/find. Let me know what's broken. Let me know what's missing. And if you come up with a better name than "Book Finder" I am, sincerely, all ears.