Book Accelerator
A guided reading app that combines chapter summaries, practical examples, and quiz-gated progression to improve retention.
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Problem Statement
Constraints, scale, and what success looks like.
Book Accelerator is designed to make reading active instead of passive. Each chapter is broken into summaries, examples, and quizzes that unlock the next chapter only after passing.
Solution
How the system works end-to-end.
Book Accelerator is designed to make reading active instead of passive. Each chapter is broken into summaries, examples, and quizzes that unlock the next chapter only after passing.
AWS Services Used
Core services and why they are in the design.
Architecture Decisions
Tradeoffs and reasoning behind key choices.
Quiz-gated progression
Users must pass chapter quizzes to unlock the next chapter, reinforcing comprehension before progressing.
Local-first data model for UI phase
The current UI phase stores state in localStorage so product behavior is testable end-to-end before backend rollout.
Security Model
IAM, encryption, and exposure controls.
Client state is scoped to browser storage with explicit reset controls
No external content execution in chapter rendering
Prepared backend contract for server-side entitlement and progress enforcement
Reliability Patterns
Retries, DLQs, idempotency, and resilience.
Safe hydration fallbacks when localStorage content is malformed
Locked chapter safeguards prevent invalid navigation
Graceful empty states when onboarding has not been completed
Observability
Logs, metrics, alarms, and tracing.
Consistent state keys for dashboard, book progress, and notes
Structured error banners and empty-state fallbacks across main routes
Deterministic chapter/quiz models for reliable QA coverage
Cost Considerations
Cost drivers and how you keep them under control.
- Frontend-only UI phase has near-zero runtime cost
- Backend plan uses serverless primitives to keep ingestion and API costs predictable
Key Takeaways
What you learned and what you would improve next.
- Integrate published book ingestion and versioning
- Add server-side progress sync and entitlement enforcement
- Enable Stripe-backed Pro subscription for extended access
Technologies Used
Quick scan of tools used in this build.