I posted Book2Course here ( https://news.ycombinator.com/item?id=46932010 ) a couple of weeks ago and got some valuable feedback. The main criticisms were that the course output felt template-like, quizzes were too surface-level, and the content lacked depth.

  I went back and rebuilt most of the generation pipeline. Here's what changed:

  What's new in V2:
  - Step-by-step lessons instead of walls of text — you click through sections, can't just scroll past
  - Inline comprehension checks mid-lesson (compulsory — you have to answer to continue)
  - Quiz explanations that tell you WHY you're wrong, not just "incorrect"
  - Spaced repetition flashcards auto-generated per chapter (exportable to Anki)
  - Practice mode: generate fresh AI questions across any chapters at any difficulty
  - AI Tutor grounded in YOUR book — highlight any text and ask about it
  - Page references so every concept traces back to the source
  - Chapter selection — pick the chapters you need, skip the rest
  - Knowledge map showing how concepts connect
  - Difficulty verification: a second AI pass checks that question difficulty ratings are accurate

  What it's NOT: a summarizer. If your book spends 10 pages on recursion, the course reflects that depth. The lessons stay faithful to the source material.        

  Tech stack: Next.js, FastAPI, Supabase, OpenRouter for AI generation. Processing a 300-page book takes ~3 minutes.

  Free tier: 1 book + 3 notes/month. No credit card needed.

  https://book2course.com

  I'd especially love feedback on course quality — that's where I focused most of the rebuild. Try it with a textbook you know well so you can judge the output. I will read every comment and look at EVERY feedback! Yes and we have launched on Product Hunt! I am so excited!