● DISCONNECTED
MODEL: claude-sonnet-4-6 key encrypted on your device · sent only to Anthropic

⚠ You need a Claude API key to use this tool.

How to get a Claude API key

  1. 01Go to console.anthropic.com and create a free account.
  2. 02Click API Keys in the left sidebar, then Create Key.
  3. 03Copy the key (it starts with sk-ant-). You'll only see it once, so paste it somewhere safe.
  4. 04Paste it into the field above and click CONNECT. The key stays in your browser only — it's never sent to this site.

// Your key is encrypted with AES-256 and stored on your device only. It is never sent to our servers — requests go directly from your browser to Anthropic's API. You get $5 of free credit when you sign up. Each use of this tool costs a few cents at most.

// tool 04 · kdp publishing

Book Creator

Pick a book type, add a niche if you have one, and let Katharyne's research method do the heavy lifting. Eight steps from blank page to a fully planned, market-ready book.

1
Choose a Template
// ACTIVE

Select the type of template for your book. Add an optional niche to narrow down the ideas.

// THINKING......