305903 (2) [Avatar] Offline
#1
The Epub version has the code listings in a very small font size relative to the font size of the main text, making it hard to read it.

When the font size of the main text is increased in the Epub version, the font size of the code listings also remains the same!

The Kindle version has the code listings in a font size that follows the font size of the main text. It is readable and works well. See attached screenshot for a comparison.
534139 (2) [Avatar] Offline
#2
This may depend on the reader (application or device) that you are using with the .epub files.

I am reading the book in epub format using IOSv11 iBooks on an iPad and the code text appears to scale up and down with the other body text.

Andy