New19 Sept 2026
Invite a friend
Hunter pays for itself: every friend who subscribes to Hunter gives you a month back. Hunter members find their invite link on the account page. Up to 6 months held at a time.
Scanning is live
34,027,474
Books to search
Search for used books across multiple marketplaces
You choose the book and ShelfKeepr continuously searches until a match is found.
- Free on Watcher tier
- Email notification on match
- Join 200+ collectors already hunting
Match Found live
T
The Hobbit
J.R.R. Tolkien
Price
$12.50
Condition
Very Good
Source
eBay US
Good Omens
Scanning eBay and Etsy… checked 4 min ago
Market Places Searched
Steal of the month
This month's best saving
Will yours be next?
S
73% underConfirmed by the marketplace
Slaves to Darkness· John French
Paid
£5.72
Going rate
£21.49
Saved
£15.77
23 other copies, £8.66 to £89.99
Like New · eBay · found the same day · United Kingdom member
Also found this month
- L
LegionDan Abnett · Acceptable · eBay$20.00$64.99· 69% under - B
Best of Hammer and Bolter: v. 2Christian Dunn · Brand New · eBay$15.00$34.98· 57% under - B
Battle for the AbyssBen Counter · Very Good · eBay£10.80£22.85· 53% under - T
The Master of Mankind (41) (The Horus Heresy)Aaron Dembski-Bowden · Good · eBay£13.15£26.70· 51% under
How to search
You add the books. We do the rest
The Hobbit - first edition…ISBN
T
The Hobbit
J.R.R. Tolkien
T
The Hobbit - Hardback
J.R.R. Tolkien
T
The Hobbit (Signed)
1st Print · Rare
Step 01
Go to your dashboard and add the books you're searching for
Search by title, author, or ISBN. Set your condition preference and a max price.
WatcherHunterLast copy1 hr30 minScarce2 hrs1 hrUncommon8 hrs4 hrsPlenty around12 hrs6 hrs
Step 02
ShelfKeepr scans the market
Our scan frequency is increased for rarer books, and for Hunter tier accounts.
S
ShelfKeepr
just now
American Gods found
$9.25
Good · eBay US
The Silmarillion · searching…
Nineteen Eighty-Four · searching…
Step 03
Get notified
The moment we find a match, we'll email you and put a direct link to the listing in your dashboard.
Suggested Reading lists
See what other collectors recommend
Reading lists are put together by collectors and by us. Track a list and every book you don't already own joins your search.
- 1L
T
H
5.0 · 2 ratings1 tracking - 2E
F
U
5.0 · 1 rating0 tracking - 3T
E
C
No ratings yet1 tracking - 4A
A
A
No ratings yet0 tracking - 5P
T
D
No ratings yet0 tracking - 6T
T
T
No ratings yet0 tracking - 7N
N
NNo ratings yet0 tracking - 8T
T
T
No ratings yet0 tracking - 9SA
G
No ratings yet0 tracking
See all lists Watcher tracks 1 list · Hunter tracks as many as you like
Why it finds more, for less
One place, one search
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.
Already own it?
Catalogue and organise your collection
Search the catalogue…
G
Good Omens
Neil Gaiman
A
American Gods
Neil Gaiman
T
The Silmarillion
J.R.R. Tolkien
Step 01
Add your existing collection to your shelf
You'll see what you've got, and what you haven't.
First editions5 books
Modern classics3 books
Science fiction3 books
Step 02
File it into a collection
Group books by series or author. Nest collections inside collections. However your shelf works in your head, we digitalise it.
My Shelf106 books
G
A
Step 03
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.
Missing from the catalogue?
Add any book yourself
Our catalogue is large, but not infinite. Add missing books by entering the ISBN or the title and author.
- 1ISBN978-0-261-10221-7Look 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.
- 2The HobbitJ.R.R. TolkienPaperback - 1991HarperCollins
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 catalogueThe HobbitNow 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 searched by its title, author and edition. Either way, once it is in, it is in for everyone.
Pick your tier
One tier to watch. One to hunt
Every marketplace we search is searched for everyone. Increase your search capability with Hunter.
Watcher
Free
No card needed.
- Active search limit: 1
- A wish list of 10 books: one searching, the rest queued
- Track 1 entire reading list.
- Catalogue your whole collection
- Very rare books are checked every hour
- Immediate notifications when a copy matches
- Seven filters on every listing
Most popular
Hunter
$3.99/month
Billed monthly · cancel any time
Everything in Watcher, plus:
- Active search limit: 100
- Unlimited reading list tracking
- Very rare books are checked every 30 minutes
- Additional filters: signed, first edition, hardback, illustrated, annotated
- Referral rewards
- Cancel whenever you like. Your shelf stays yours
- 14-day cooling off period if you change your mind, for a full refund
How often we check
Set per book by how many copies are listed.
Watcher HunterLast copy1 hr30 minScarce2 hrs1 hrUncommon8 hrs4 hrsPlenty around12 hrs6 hrs
Last copy
Scarce
Uncommon
Plenty around
Watcher
Every hour
Every 2 hrs
Every 8 hrs
Every 12 hrs
Huntertwice as often
Every 30 min
Every hour
Every 4 hrs
Every 6 hrs
Hunter checks every band twice as often.
Bring a friend
Earn rewards
Every friend who subscribes earns you a month of Hunter. Know someone 3 books short of a full set? Send them your link.
Your invite link
shelfkeepr.com/invite/xxxxExample
Hunter members find theirs on the account page.
Step 01
Share your link
SSam R.Joined through your link · Subscribed to Hunter
Step 02
They subscribe to Hunter
2 months earned, 1 on hold
Step 03
Enjoy a month of Hunter
New on ShelfKeepr
What's new
18 Sept 2026
Reading lists
Whole series and sets, from us and from members. Track a list and it checks your shelf, skips what you own and queues the rest in order. Rate and review the ones you use.
Browse the lists17 Sept 2026
Most hunted
A public board of the books members are hunting right now, by community, and a thread on every book. Say which printing to avoid, or that you found one.
See the board15 Sept 2026
Steal of the month
The month's best confirmed buy against what everyone else was seeing for the same book, on the homepage and at the top of your dashboard.
This month's stealWant 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.