CBZ is a ZIP archive containing ordered comic-book images. Store a CBZ file in Files and select it to open the available comic or archive viewer.
The Books import tool accepts EPUB, PDF, and plain-text ebooks; it does not add CBZ files to the ebook shelf. Keep comic archives in a clearly named Files folder and use Favourites when you want quick access.
Page order comes from the image names inside the archive. If pages appear out of order, correct the names before rebuilding the CBZ. Use zero-padded names such as 001.jpg, 002.jpg, and 010.jpg.