Weird. They accidentally killed the joke in this comic by removing the titles from the books. Here’s the alt text of the image, which still has the titles:
Hibernate the EASY WAY / Become one of the HERD! / How to AVOID Natural Selection / Do it by INSTINCT by / DARE to be NOCTURNAL / Predator-prey Relationships
I wonder how that happened
My guess is that they edited the original to be a blank template for adding localized text onto, and forgot to add back the English titles. No idea if that’s actually the case, it’s just the only reason I can think of for editing the titles at all. They have edited some of the comics before to update small details
Ohhhhhhhh. I was thinking the joke was that animals can’t read therefore the books were all blank.