Bookokrat

Bookokrat is a terminal-based EPUB reader with a split-view library and reader, full MathML and image rendering, automatic bookmarks, and inline annotations.

Demo

What You Can Do

• Browse every EPUB in the current directory, drill into the table of contents, and resume exactly where you left off.
• Search inside the current chapter or across the whole book, jump through a per-book history, and inspect reading statistics.
• Highlight text, attach comments, copy snippets or entire chapters, and toggle the raw HTML source for debugging.
• Open images in-place, follow internal anchors, launch external links in your browser, and hand off the book to your system viewer.

Keyboard Reference

Bookokrat follows Vim-style keybindings throughout the interface for consistent, efficient navigation.

Global Commands

• q - Quit application
• Tab - Switch focus between library/TOC and content panels
• Esc - Clear selection/search or dismiss popups

Navigation (Vim-style)

• j/k - Move down/up (works in all lists and reader)
• h/l - Collapse/expand in TOC; previous/next chapter in reader
• Ctrl+d / Ctrl+u - Scroll half-page down/up
• gg - Jump to top
• G - Jump to bottom
• Ctrl+o / Ctrl+i - Jump backward/forward in history

Search

• / - Start search (filter in library/TOC; search in reader)
• n / N - Jump to next/previous match
• Space+f - Reopen last book-wide search
• Space+F - Start fresh book-wide search

Library & TOC Panel

• Enter - Open highlighted book or heading
• h / l - Collapse/expand entry
• H / L - Collapse/expand all

Reader Panel

• h / l - Previous/next chapter
• Space+s - Toggle raw HTML view
• Space+c - Copy entire chapter
• Space+z - Copy debug transcript
• c or Ctrl+C - Copy selection
• p - Toggle profiler overlay

Comments & Annotations

• a - Create or edit comment on selection
• d - Delete comment under cursor

Popups & External Actions

• Space+h - Toggle reading history popup
• Space+d - Show book statistics popup
• Space+o - Open current book in OS viewer
• Enter - Open image popup (when on image) or activate popup selection

Popup Navigation

All popups (search results, reading history, book stats) support:

• j/k - Move up/down
• Ctrl+d / Ctrl+u - Half-page scroll
• gg / G - Jump to top/bottom
• Enter - Activate selection
• Esc - Close popup

Mouse Support

• Scroll with the wheel over either pane; Bookokrat batches rapid wheel events for smooth scrolling.
• Single-click focuses a pane; double-click in the library opens the selection; double-click in the reader selects a word; triple-click selects the paragraph.
• Click-and-drag to highlight text; release on a hyperlink to open it; drag past the viewport edges to auto-scroll.
• Click images to open the zoom popup; click again or press any key to close; clicking history or stats entries activates them immediately.

Quick Start

• Install Rust via https://rustup.rs if needed.
• Install using Cargo:

cargo install bookokrat

• Place EPUB files alongside the binary (or run within your library directory) and navigate with the shortcuts above.

Attribution

This project is based on bookrat by Dmitry Sobolev, licensed under the MIT License.