Google NotebookLM is powerful, but it lacks folder management. As your notebooks grow, finding the right one becomes frustrating. Bookshelf is a free Chrome extension that fixes this: 📁 Folders & Subfolders — organize notebooks in a tree structure 🖱️ Drag & Drop — rearrange notebooks intuitively 🔍 Search & Sort — filter instantly by name or date ☁️ Cloud Sync — sync across devices 🌙 Dark Mode support 🌐 6 Languages (EN/JA/ZH/KO/ES)