Your books already know what you want to read next.

Your library, on paper and on your Kindle or Kobo. We'll suggest what comes next, and only what's already out there second-hand and at a good price.

Try it without an account. We compare every edition of the books we already watch; if one is missing, ask us for it. Prices from Spanish bookshops, for now.

Explore the 840 books we already watch →
Prices on 17 October 2026Romeo y Julieta · €3.21 −78%LA HIJA DE LA NOCHE · €3.21 −76%Las bicicletas son para el verano · €3.21 −74%El inversor inteligente · €10.51 −74%¡Sonríe! · €4.50 −73%Amanda Black 1 - Una herencia peligrosa · €4.58 −71%Diario de Greg 1 - Un pringao total · €4.57 −71%El secreto · €6.39 −71%Don Quijote de La Mancha · €4.21 −71%Asesinato para principiantes · €5.56 −71%

How it works

From your phone, in three steps. No password.

  1. Pecia: the “Add books” menu, with shelf photo, search, barcode, import and pasted wishlist.

    Add your books

    Photograph your shelf, scan a barcode, search for a title or import your history from Goodreads, StoryGraph or Kindle.

  2. Pecia: the library, with “For you” suggestions and the books on your shelves.

    Everything in one place

    What you've read, what you're reading and what you've lent, on paper, as an ebook or an audiobook. “For you” suggests what to read next, from Pecia's guides and what you liked.

  3. Pecia: the wishlist, with each book's second-hand price and an alert below €5.

    We alert you on drops

    Save what you want to read, with a maximum price if you like. In Spain, we write when a second-hand copy drops below it.

Screenshots of a sample account, with prices from the latest crawl. Your library is private: nobody else sees it.

No ads and we don't sell your data. An email when it matters, nothing else. Privacy

What you've read

Rate with one tap. That's all we need.

Your library comes in on its own

No typing titles, no scanning barcodes one by one. Paper and ebooks each come in their own way. Coming from Goodreads or StoryGraph? Bring your list. See what your to-read list costs today.

On paper · one photo

Photograph your shelves

One photo, twenty spines. Ten photos and your whole bookcase is in, in the time it would take to scan three barcodes.

On Kindle or Kobo · one cable

Plug in your Kindle or Kobo

Plug it into your computer and we read your whole library — with how far along you are in each book. No Amazon or Kobo passwords: just the cable. Got PDFs? Convert them to EPUB.

Manolito Gafotas100 %
El Príncipe de la Niebla43 %
Diario de Anne Frank12 %

It's imported from your computer, not synced in the background: you bring it in whenever you want. And the book never leaves your device — we only read the title and your progress.

And for your ebooks, free: Validate EPUB · Ebook compatibility · All tools

Lend and swap with your friends

Before the second-hand price, check who already has it. Your friends see the shelves you show them, and you see theirs.

Their shelves

What your friends own

If a friend has a book from your list, we tell you before its price. Ask to borrow it with one tap.

Ana has 3 books from your list

Loans

Know who has your book

Note who you lent it to and until when, even if they're not on Pecia: a name is enough. No more books that never came back.

El monje que vendió su FerrariAna has had it since 12 September

Swaps

One of yours for one of theirs

Pick a book of yours and one from their shelf, and propose it. When each of you has something the other wants, we propose it for you.

Ana has one you're watching, and you have one they wantYou get: Romeo y Julieta€3.21You give: Las bicicletas son para el verano€3.21

You can track ebook loans too, just like paper ones. Only files that are public domain in Spain or openly licensed travel through Pecia; we don't touch the rest. Swaps are paper only.

A used book is a book that doesn't need printing.

Printing one copy of about 300 pages emits around 1.2 kg of CO₂ across raw materials, plates, printing and delivery. One that's already printed emits nothing: it just changes shelves.

That's why Pecia only looks at the second-hand market. It isn't a stance: it's the only place where the price moves and nothing gets cut down.

Figure from the Spanish Pulp, Paper and Board Association, via Podiprint. It ranges from 250 g to 1 kg depending on paper and inks.

What you owe the forest

11

copies rescued instead of printed

≈ 13 kg of CO₂

never emitted

And when you finish one, you put it back into circulation from right here.

What's next

None of these show up because they're trending. They show up because they fit what you rated highly, and because copies are going around today.

Because you read La casa de Bernarda Alba

Bodas de sangre

Federico García Lorca

More by Federico García Lorca, and right now there are 68 used copies going around.

€4.52−55%

Because you read El monje que vendió su Ferrari

El líder que no tenía cargo

Robin Sharma

More by Robin Sharma, and right now there are 17 used copies going around.

€13.92

Because you read Crónica de una muerte anunciada

Cien años de soledad

Gabriel García Márquez

More by Gabriel García Márquez, and right now there are 38 used copies going around.

€7.49−42%

This week's prices

The cheapest against their cover price, from the latest pass through second-hand bookshops.

See every book →

And what people say

Video reviews of every book, right on its page. No other app has them.

ROMEO Y JULIETA de William Shakespeare | EL MEJOR RESUMEN COMPLETO Y ANÁLISIS LITERARIOProfesor Paolo Astorga · Romeo y JulietaLa Hija de la Noche 🔥 Resumen [Laura Gallego]Resumen Club · LA HIJA DE LA NOCHEResumen completo de «Las bicicletas son para el verano» de Fernando Fernán GómezTu Novela · Las bicicletas son para el verano💡 EL INVERSOR INTELIGENTE de Benjamin Graham: RESUMEN animado del libro en Español | RESEÑA 2021Bolsa para principiantes · El inversor inteligente

Searching is free. We do the waiting.

Your library — what you've read and what you want to read — works from any country. And if you're in Spain, we wait for new releases to drop in price for you. That's what the account is for.

Pecia is in open beta. Confirm your email and you're in. That's it. Privacy

Pecia is in open beta

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