Hi! Hopefully I'm doing this correctly as I've never used Google Groups before.
I'm reading the kepub version of this book on my Kobo Libra Colour, side-loaded onto my device via Dropbox.
At the very end of Chapter IV ("Poirot Investigates"), there's an svg image that is both very small and very blurry on my ereader (it looks fine when opened with Calibre/on PC though). Double tapping to open the image viewer just made it larger (still blurry).
I'm self-taught at tech stuff so have big gaps in my knowledge, but I fiddled with the css and the only way I was able to fix it so the image would render large and clearly was to resize the vector image itself (it was 100 x 74 initially, with matching viewbox).
My knowledge is too limited to fix otherwise so I thought I'd note it here. Thanks for all the great work!