Books with Full Page Images

rhsanborn · 08-11-2025, 08:29 AM

I've been cycling all weekend and was hoping someone could maybe point me in the direction of a thread, wiki, or article that could get me on the right track. My 7 year old is an avid reader and we're getting him his first ereader (a Boox so I can load KoReader, and comic apps, Kindle, Hoopla, etc.). He is at the right age for the books that are graphically intense (Captain Underpants, Geronimo Stilton) where the pages are often just full page images. These don't play well with KoReader. They tend to not stretch to fill the page, etc. I started going down the rabbit hole of converting a few to CBZ, but now I have a challenge in Calibre-Web/Autmomated with getting the metadata to populate since that needs to be embedded in ComicInfo.xml.

I was curious if anyone else has dealt with similar books and had a recommendation, or if I should stay the course of treating these like graphic novels and convert to CBZ, etc. It's just a pain since their distribution is all in the normal spaces so it's all ePub and Mobi and the conversion is really manual.

jackm8 · 08-11-2025, 08:04 PM

CBZ is just ZIP file named CBZ, so readers know to open them as comics. If pages are really just images, then you can just compress them, and change file extension from ZIP to CBZ, and you should have no problems in Koreader.

08-11-2025, 08:29 AM	#1
rhsanborn Member Posts: 18 Karma: 210 Join Date: Nov 2008 Device: Sony PRS 505	Books with Full Page Images I've been cycling all weekend and was hoping someone could maybe point me in the direction of a thread, wiki, or article that could get me on the right track. My 7 year old is an avid reader and we're getting him his first ereader (a Boox so I can load KoReader, and comic apps, Kindle, Hoopla, etc.). He is at the right age for the books that are graphically intense (Captain Underpants, Geronimo Stilton) where the pages are often just full page images. These don't play well with KoReader. They tend to not stretch to fill the page, etc. I started going down the rabbit hole of converting a few to CBZ, but now I have a challenge in Calibre-Web/Autmomated with getting the metadata to populate since that needs to be embedded in ComicInfo.xml. I was curious if anyone else has dealt with similar books and had a recommendation, or if I should stay the course of treating these like graphic novels and convert to CBZ, etc. It's just a pain since their distribution is all in the normal spaces so it's all ePub and Mobi and the conversion is really manual.

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08-11-2025, 08:04 PM	#2
jackm8 Addict Posts: 339 Karma: 3000000 Join Date: Nov 2015 Device: none	CBZ is just ZIP file named CBZ, so readers know to open them as comics. If pages are really just images, then you can just compress them, and change file extension from ZIP to CBZ, and you should have no problems in Koreader.