Really, if Ginko doesn't want people to mess with the animals, then that means someone's going to mess with the animals. And that person is Strange. He had dropped by ostensibly to see the fancy chicken, but the monster book of monsters caught his eye the moment he spotted it. A sentient book? Who knows what sort of things would be written in there. He just had to pick it up and read it...

There's a yelp of surprise coming from the monster book's cage as Strange just backs away. When Ginko arrives to see what's up, Strange just points an accusatory finger at the book as he huffs, "The book tried to bite me!"

Which really, isn't something books should do, even if they're magic books. Of course, the only reason it tried to bite Strange was that the magician got the brilliant idea to poke the book in the first place.