What is Find Books?
Search by ISBN code, or title and author name, to find books from domestic and international databases and easily look up page count, cover images, and other details.
Main Features
- Search by ISBN Code Enter an ISBN code (13 or 10 digits) to get accurate information for that specific book. You can also scan barcodes with your camera or load barcode images.
Auto-fill from ISBN search is Free for all plans
- Search by Title Just enter part of a book title to search for matching books. Example: "Hemingway" "Great Gatsby" etc.
- Search by Author You can also search for books by author name. Easily find works by your favorite authors.
Auto-fill from search results is Paid (Free plan users can view results and enter manually)
Search by ISBN Code
Use the ISBN barcode (13 or 10 digit number) on the back cover of a book to identify it most accurately.
1. Open the book info edit screen
Double-click on the book info area to open the edit screen.
2. Enter ISBN
Enter the ISBN code in the ISBN field. There are two ways to enter it:
- Barcode scan: Click the button next to the ISBN field to open the barcode scanner. When you capture a barcode with the camera, the ISBN is automatically read and filled in.
- Manual entry: Directly enter the 13-digit (or 10-digit) number from the back cover of the book. Hyphens are optional.
💡 If your camera is unavailable, you can use the "Scan from Image" tab to load a barcode image.
3. Click the icon in the ISBN field
When a valid ISBN is entered, a icon appears at the right end of the ISBN field. Click it to search for the book by ISBN.
4. Auto-fill complete!
Title, author, and page count are automatically filled in. Make any necessary edits and click [OK] button.
Search by Title and Author
1. Open the book info edit screen
Double-click on the book info area to open the edit screen.
2. Enter book title and author
Enter the title and author name.
3. Click the 
next to the title field
Search for the book from databases using the title and author name.
4. Select from search results
Choose the book you want to register from the displayed search results and click [Select This Book] button.
5. Auto-fill complete!
Title, author, and page count are automatically filled in. Make any necessary edits and click [OK] button.
Search Tips
- Partial match search You can search with just part of the title (e.g., "Galaxy" finds "Night on the Galactic Railroad")
- First or last name only works Example: "Hemingway" will show Ernest Hemingway's works
Important Note
When book titles are updated via database search, sort order may change
For example, if you registered a book with the abbreviated name "How to Win Friends" and a database search updates it to "How to Win Friends and Influence People", if sorting by title, the display position will change from the "H" section for "How" to potentially a different position.
Your book data is not deleted. You can find it using search or re-sorting.
Search Options Paid Plan Only
For databases marked with Auto, you can directly apply book information from search results.
Search by Title + Author
Search using both title and author name. Gets the most accurate results.
Search by Title Only
Search by title only. Useful when the author is unknown.
Search by Author Only
Search by author name only. Useful for finding other books by the same author.
Select from Candidates
Select from the candidate list to retrieve title, author, cover image, and more all at once.
Cross-Bookshelf Search Paid Plans Only
Search across all reading logs registered in your bookshelf. Quickly find books or notes scattered across multiple files.
✨ Key Features
- 📚 Search Multiple Files at Once Search across all reading log files (.rfnote) registered in your bookshelf. Even if you organize files by year or category, you can search them all at once.
- 🔍 Comprehensive Search Targets Search across book titles, author names, reading logs, comments, and all other fields.
- 📍 Jump Directly from Search Results Click a search result to open the file and scroll to the matching section with highlighting.
🎯 How to Use
1. Open the search dialog with Ctrl+F (or ⌘+F)
Use the keyboard shortcut to open the search screen.
2. Check the "Search Bookshelf" checkbox
Enable the "Search Bookshelf" option at the bottom of the search dialog.
3. Enter your search term
Type your search query to search across all files in your bookshelf.
4. Click a result to jump
Click an item in the results to open that file and view the matching section.
💡 Use Cases
- Find Quotes Quickly find "which book mentioned this phrase."
- List Author's Books Search for all books by a specific author across all your files.
- Search by Theme Gather notes on a specific topic from multiple files.
Prerequisite: To use cross-bookshelf search, you need to register reading log files in the Bookshelf feature first.
Japanese Databases
OpenBD Auto
Open database of bibliographic information and cover images provided by publishers. Get accurate book information and high-quality cover images from ISBN.
Available Information
- Title, Author
- Publisher, Publication Year
- Cover Image (High Quality)
- Price, Page Count
National Diet Library Auto
Database of the national library where all books published in Japan are registered. The most comprehensive source of Japanese book information.
CiNii Books Web
Database for searching books held by Japanese university libraries. Ideal for finding academic and specialized books.
Calil Web
Search collections and availability of over 7,000 libraries across Japan. Quickly find out if you can borrow from a library near you.
International Databases
Google Books Auto
One of the world's largest book databases provided by Google. Supports some Japanese books and can retrieve cover images.
Open Library Auto
Free library project operated by Internet Archive. Primarily features English books, and some can be read for free.
WorldCat Web
Search collections of over 10,000 libraries across 170 countries. Find books held by libraries around the world.
National Libraries
Library of Congress Auto
The world's largest library. Contains information about books published in America and books from around the world.
British Library Web
National library of the United Kingdom. Holds books and documents from around the world, centered on English-language materials.
Deutsche Nationalbibliothek Web
National library covering books published in the German-speaking world. Rich collection of academic and specialized books.
Bibliothèque nationale de France Web
Covers books published in the French-speaking world. Holds a wide range from medieval manuscripts to modern publications.
Europeana Web
Cross-search collections of European museums, libraries, and archives. Search not only books but also paintings and music.
Translation Search Paid Plan Only
Easily find translated versions (other language editions) of books you've read. Searches worldwide book databases for different language editions of the same work.
Main Features
- Automatic Translation Search Automatically search for translated versions based on book titles registered in your reading logs.
- Support for 30+ Languages Search for editions in English, German, French, Spanish, Italian, Portuguese, Russian, Chinese, Korean, and many other languages from around the world.
- Grouped by Language Search results are grouped by language, making it easy to find the edition in your target language.
- Links to Country-Specific Amazon Found translations can be searched directly on that language's Amazon. Example: German edition → amazon.de, French edition → amazon.fr
Use Cases
- Language Learning Find original or foreign language versions of your favorite books for language study.
- Comparative Reading Read different language versions of the same work to enjoy translation differences.
- Gift Selection Convenient for giving books published in a friend's native language as gifts.
Related Pages
How to Take Reading Notes
After adding your book, start recording reading logs. Learn effective note-taking in 5 simple steps.
→ View Reading Logs GuideRemember What You Read
Stop forgetting books. Learn scientific reading techniques using summary and spaced repetition.
→ View Memory TechniquesStudy Management
Use Reading Forest for study management. Register textbooks by ISBN and visualize your progress.
→ View Study Management GuideAuto-Retrieval is Paid Plan Only
Auto-retrieval from databases marked with Auto and Translation Search are available on Personal Plan and Group Plan.
Link searches to databases marked with Web are available on the Free Plan.
View Plan Details