The Hippo at the End of the Hall ($16) by Helen Cooper
Amazon's Description: "The invitation to the Gee Museum was delivered by bees. It wasn't addressed to anyone, but Ben knows that it was meant for him. Why else would the images on the postcard have stirred up memories of his father, who was lost at sea long ago? Ben makes his way to the old dilapidated building to find a host of curious talking animals awaiting his arrival. They are certain he is the only one who can save the museum. But Ben and the animals in the Gee collection will have to outwit a devious rival museum owner and a greedy land developer. With a bit of luck, some strange magic, and a little help from his mom, Ben might succeed in ensuring the future of the museum — and finding the answers about his father that he's been searching for his whole life."
Ages It's Best Suited For: 7-9