The midnight visitor
(Book)

"One stormy night, a little black kitten named Peter appears on the museum steps. Tabby cat Tasha is delighted to show Peter the museum's hallways and secret corners, but her siblings, Bianca and Boris, aren't as happy to welcome the new arrival. Determined to prove that Peter is just as much of a museum kitten as the others, Tasha takes him on a hunt for rats. When there's a mishap in the Dinosaur Gallery, all of the kittens must work together to fix the situation. Can they do it?"--,Amazon.