The sidebar image plugging Max Barry's latest book has recently changed from Lexicon to Providence - as you have probably noticed . However, clicking on the image still redirects you to https://maxbarry.com/lexicon/. It should now presumably link to https://maxbarry.com/providence/, should it not?
I've also noticed that the old button tucked away at the top-right of the Lexicon image allowing you to hide it from display if you'd bought one of Max's books has been removed with the Providence update...