A 3.8-star book changed your life. A 4.5-star book you already forgot.

We don't care how many
books you read.

We care that the next one matters. A reading companion that learns your taste and finds books you'd never discover on your own.

Meet your companion.

A reading partner that remembers every book you've loved and tells you why the next one might land. Every recommendation comes with a reason.

Companion notes

A note on every book.

Your companion writes you a short note about why this book might land, rooted in what you've already loved rather than what's trending.

Shelf picks

The books you already own, in the right order.

Forgotten gifts, impulse buys, the ones you meant to get to. Your companion surfaces the book you're actually ready for right now.

For You

Daily picks that actually get you.

Fresh recommendations every morning, each with a reason that proves it. Not a bestseller list. Books that fit where you are right now.

No stars.
Feelings.

A cozy romance and a devastating literary epic both get 4.1. One made you smile. One broke you open. Your shelf shouldn't treat them the same.

Loved, liked, couldn't finish. Tap what resonated, then write a real review in your own words if the book deserves it.

Loved

Liked

Disliked

DNF

What resonated?

Beautiful Prose World-Building Moral Complexity Unreliable Narrator Sense of Place Found Family

Moods, not genres.

Browse by how you want to feel. Heartbreaking. Strange & Unsettling. Quietly Devastating. Tap a mood, find books that match, ask your companion to pick the right one for you.

Build a shelf
from a feeling.

Type what you want. Something like "cozy mysteries for a rainy weekend" or "literary horror with a grieving narrator." Your companion reads the intent and builds you a shelf from scratch.

Not keyword search. A curated pull from the whole catalog, matched to what you actually meant.

Your shelf,
not a spreadsheet.

A place that knows what moves you. Scan your physical bookshelf with your camera. Build custom shelves. No reading goals, no page-count dashboards, no guilt notifications.

Bring your
reading with you.

Paste your Goodreads profile URL or drop in a StoryGraph export. Spine imports everything in one step: shelves, ratings, status. Every book gets matched to its canonical edition so your history stays intact.

No manual re-rating. No losing books to bad metadata. Your library, already here.

Connect your Goodreads to import shelves

Finds from friends.

See what the readers you trust are shelving. No likes to chase, no streaks, no leaderboards. Just books passing between people who care about taste.

Where do I start?

Full author pages with complete bibliographies, series order, and your companion's take on where to begin. No more Googling "what order to read Ursula Le Guin."

Agent-native.

CLI and MCP server included. Your AI agent can search your shelf, pull recommendations, and talk to your reading companion.

> spine search "something dark and short"
  The Road by Cormac McCarthy
  We Have Always Lived in the Castle

> spine ask "the dispossessed"
  This will surprise you because it sounds
  political, but what it actually is is a
  portrait of a man who is an outsider on
  every world he ever stands on...

Reading isn't a sport.

The best book you'll read this year might take you three months. You might reread something instead of starting something new. You might go weeks without reading. None of that means you're failing.

Spine exists for people who care about what they read, not how much.

We don't care how manybooks you read.