Some books are hard to find. We don't sleep either
ShelfKeepr watches every marketplace we cover for the horror books you're missing - out-of-print paperbacks, small-press hardbacks, the 80s cover you remember - and emails you the moment a copy lands under your limit. Every provider, on every tier, free included.
A used copy typically costs about 60% less than a new one. Find one book and the month has paid for itself.
- Free on Watcher
- No card needed
- 200+ collectors already hunting
Pick your tier
One tier to watch. One to hunt
Every marketplace we search is searched for everyone, free tier included. What you pay for is how many books you can chase, how often we go back for them, and how hard we filter.
- Books on the hunt: 1
- A wish list of 10 books: one hunting, the rest queued to swap in
- Catalogue your whole collection
- Every marketplace and dealer we search
- A last copy checked every hour, through the night
- Immediate notifications when a copy matches
- Seven filters on every listing, so you only see the book
- Price limit and condition filters
- Books on the hunt: 100
- A last copy checked every 30 minutes - 48 times a day, 1,440 a month, for one book
- That 30 minutes is the floor: hourly when a handful are left, every four hours when there are plenty
- Must-be filters: signed, first edition, hardback, illustrated, annotated
- Cancel whenever you like. Your shelf stays yours
Hunter checks every band twice as often.
How the hunt works
You add the books. We do the rest
Add the books you're hunting
Search by title, author, or ISBN. Set your condition preference and a max price.
Our algorithm hunts harder for rarer books
Every book gets its own schedule, set by how many copies are listed. Watcher checks a last copy every hour. Hunter checks it every 30 minutes - 48 times a day, per book, right through the night.
Get notified
The moment we match your search, we email you a link direct to the listing.
Missing from the catalogue?
Add any book yourself, in seconds
Our catalogue is large but it is not everything - small presses, foreign printings and brand-new releases slip through. Type the ISBN and the book is in. No ISBN printed on it at all? Type what is on the cover instead. No request form, no queue, nobody at our end to wait for.
- 1ISBN978-0-14-143984-6Look it up
Type the ISBN
The 13 digits off the back cover or the copyright page. Special editions and small-press printings often carry none - say so and you fill in the cover details instead.
- 2DraculaBram StokerPaperback - 2003Penguin Classics
Found via ISBNdb. Confirm to add it to the catalogue.
Add to catalogueCheck it is the right book
We look it up and show you the cover, edition and publisher before anything is added, so a mistyped digit never becomes a wrong hunt.
- 3Added to your catalogueDraculaNow hunting - first search running
Start hunting it
Confirm and the book joins the catalogue there and then - ready to track, with its first search running immediately.
A book with an ISBN carries the identifier the marketplaces match on; one without is hunted by its title, author and edition. Either way, once it is in, it is in for everyone.
Why not just check yourself?
Because it isn't one search a day. It's 181, per book
Checking the marketplaces once a day feels like covering it. That works until the copy you wanted turns up on the morning you were busy.
- 1,440 checksa month, on one rare book
- A book down to its last copy is checked every 30 minutes on Hunter. 48 times a day, right through the night. Watcher checks that same book 24 times a day.
- 181 searchesa day, for that one book
- A check isn't a search. It runs on eBay in your own market and on Etsy, on the title, the ISBN and the book's other printings. Measured 13 September 2026 - about four and a half eBay calls and one Etsy call, every check.
- 99 termsbinned before you see them
- Badges, mugs, keyrings, figures, dice, board games, plush, audiobooks, CDs, download codes, magazines. Then job lots, bundles, listings outside the books tree, wrong-language editions, and "Books of Blood 2" when you asked for volume one.
You stop watching the marketplace. We don't.
Why it finds more, for less
One place, one search
Your hunt · No limit · Any condition · Any copy
Same title and author, but not the ISBN you're tracking — likely another printing or publisher.
Your hunt · No limit · Any condition · Any copy
Elusive books get hunted harder
Every book gets its own schedule, set by how many copies are listed. On a last copy, Hunter looks every 30 minutes - 48 times a day, per book. Where there are plenty around, every 6 hours is enough. The attention goes where the copies are scarce.
It never gets bored of looking
A book down to its last copy is checked 48 times a day - overnight, at the weekend, on the morning you are too busy to look. Over a month that is 1,440 goes at the same book. Nobody sustains that by hand, and that is the whole point.
We show you cheaper editions too
When a different edition undercuts the one you asked for, we show you both - same title and author, different printing. Your call, not ours.
No chasing copies that have gone
If another ShelfKeepr user buys a copy you were matched to, we tell you and start looking again immediately.
We tell you how sure we are
Every result says how it matched: exact ISBN, or title and author.
Incorrect match?
Listings aren't always right. We can't fix that, but you don't need to see the same one twice. Dismiss it and it's gone from your results for good.
The junk never reaches you
Merch, bundles, audiobooks, wrong-language printings, the wrong volume of a series. Seven checks run on every listing before one is allowed to reach your inbox.
Bought it? One tap and it's shelved
Mark it as bought and the copy moves to your shelf. One hunt down, and a slot back for the next.
One search covers every user tracking the same book, so the effort goes into watching more titles rather than repeating the same lookup.
Dashboard preview
Your entire hunt, at a glance
Every book you're tracking, every match, every purchase. One page, no tabs to wade through.
Already own it?
Catalogue and organise your collection
Want to organise your existing collection? Add it to your shelf
Search the catalogue, add what's already on your shelf. You'll see what you've got, and what you haven't.
File it into a collection
Group books by series or author. Nest collections inside collections. However your shelf works in your head, it can work that way here.
See it all, at a glance
Collapse complete or idle collections. Sort A–Z, or by what you added last. Shelves keep growing, so keep yours manageable.
What Hunter actually buys
The same providers. A great deal more searching
Every marketplace we search is searched on every tier, free included. Hunter buys the volume, the speed, and the filter that keeps the rubbish out of your inbox.
A whole want list rather than one title at a time. Every book carries its own price limit, condition and must-be filters.
A book down to its last copy is checked every 30 minutes, 48 times a day, right through the night. You would have to set an alarm.
99 excluded terms, five bundle patterns, a books-category check, a language check, a sequel-number check, an author check and a shipping check. Every listing clears all of it first.
Want to become a provider?
If you run a marketplace, a dealer network or an affiliate programme and want your stock searched for our members, tell us about it.
Every marketplace we search is searched on every tier, free accounts included.