The link for the download of the dice art on page 31, does not give the asset in a form which works with the program code. The download link has 2 rows and three columns and also has some padding between each image. As with my comment about the dragon.png download, it may be good to get the right sprite sheet as a download asset from your site, so changes upstream don’t break the book code.
I ended up re-arranging the images into a sprite sheet with 2 rows and 3 columns, without padding, then changed the relevant fields in the from_grid call. I have attached my png here, in case you want to use it (I don’t need credit - just continue to credit James White for the original images).
