— Book / Serializing

Library.

An independent AI e-book library: each book covers exactly one AI subscription you already pay for, or one workflow — what to learn, what to skip, when to switch tools. Free to read online, no signup wall.

readOpen library websiteAbout the library

Free to read online · No signup wall · 8 books · 96 chapters

Book: Book
Status: Serializing
Edition: 8 books · 96 chapters · ~130K words
Index: 8 / 8
Format: Online library · bilingual

Most people use a fraction of the AI subscriptions they pay for — not because the tools are weak, but because nobody answers the three questions that matter: what to learn, what to skip, and when to switch.

Not an encyclopedia: only the twenty percent that covers eighty percent of real use, the rest honestly marked skippable; judgment over step lists, clear boundaries, and every number sourced and dated.

Reading Path

Read online

Every chapter free, no signup wall; Chinese first, English alongside, one-tap switch.

PDF print edition

Every book ships a typeset PDF — for slow reading, margin notes, and archiving.

Hand it to your agent

Every book provides AI-readable llms.md, so your own agent can excerpt, question, and cite by chapter.

RSS

No daily chase; if you only want to know when the next book lands, the feed is enough.

Index

8 of 8 published

01Agent in Practice · Building a Complete Agent from ScratchPublished 02Claude Code · The Orchestration Console in Your TerminalPublished 03Codex · An Async Coding Agent on Multiple FrontsPublished 04Cursor · A Meta-ToolPublished 05Warp · A Terminal-Shaped Meta-ToolPublished 06Anthropic · The Part of Your Membership Worth UsingPublished 07Kimi · From Long Context to an Agent StackPublished 08OpenAI · One Subscription, Several ProductsPublished

Like a book, not a site.

The typography is a quiet editorial language: hairline rules, square corners, restrained ink — it reads like a book, not a site.

License.

Content is CC BY-NC-ND 4.0: free to read, AI excerpting and citation welcome (keep the original attribution and the source link); commercial republication and derivative rewrites are not permitted.

Record.

—2026-03 · Conventions set. The one-book-per-subscription structure and the bilingual format settled.
—2026-07 · Eight books live. Agent in Practice, Claude Code, Codex, Cursor, Warp, Anthropic, Kimi, and OpenAI all readable; the library opens.

Not an encyclopedia: only the twenty percent that covers eighty percent of use; the rest honestly marked skippable.

02Judgment, not step lists — each item answers what it saves, when to use it, and when to switch away.
03Boundary-aware: the Codex book will also tell you when to go back to Claude Code.
04Numbers have sources: prices, tiers, and limits carry check dates and first-party links; stale ones get deleted.

Some twenty more books are in draft — subscribe to the RSS feed to hear when the next one lands.

readOpen library websiteAbout the library

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GitHub

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