Calibre 开源项目是 Calibre 官方出的电子书管理工具。它可以查看，转换，编辑和分类所有主流格式的电子书。Calibre 是个跨平台软件，可以在 Linux、Windows 和 macOS 上运行。
The Calibre open source project is an official e-book management tool from Calibre. It can view, convert, edit and categorize eBooks in all major formats. Calibre is cross-platform software that runs on Linux, Windows and macOS.
Calibre 5.40.0 is officially released, the update content is as follows:
new features
Content Server Viewer: Allow editing of bookmarks
Read the cover of the CBC Comics document
Allow filtering of authors/tags when creating virtual libraries based on them
Add copy button to image view popup
Template language: support for nested functions and string concatenation operators
bug fix
DOCX output: fix comments right after <li> tags break conversion
Standalone ToC Editor: Fix fake error message if open for more than two minutes
Fix search triggering extra search while typing after manual confirmation
For more details, please check: https://calibre-ebook.com/whats-new
Calibre 5.40.0 正式发布，此次更新内容如下：
新特性
内容服务器查看器：允许编辑书签
阅读 CBC 漫画文件的封面
在创建基于它们的虚拟库时允许过滤作者/标签
将复制按钮添加到图像视图弹出窗口
模板语言：支持嵌套函数和字符串连接运算符
Bug 修复
DOCX 输出：在 <li> 标签破坏转换后立即修复注释
独立 ToC 编辑器：如果打开超过两分钟，修复虚假错误消息
在手动确认后修复键入时搜索触发额外搜索
更多详情可查看：https://calibre-ebook.com/whats-new
