---
title: "Posts — Book Notes | Hardeep Kumar"
canonical_url: "https://hardeepkumar.in/learning/book-notes"
last_updated: "2026-04-27T11:41:36.996Z"
meta:
  description: "Notes and takeaways from technical and design books."
  "og:description": "Notes and takeaways from technical and design books."
  "og:title": "Posts — Book Notes | Hardeep Kumar"
---

$ ls -la learning/book-notes/ # **<Book Notes /> ** // Notes and takeaways from technical and design books.[0posts]$ node --eval'inspectTopicPosts()'```
await queryCollection('blog')
``````
  .where('type', '=', 'post')
``````
  .where('topicId', '=', 'book-notes')
``````
  .all()
``````
[]
``````
NotFoundError: **404**
          — empty result; no rows for this topicId. Nothing to render.
``` // posts.length === 0 → no children mounted; query OK, result set empty