Sam Wu Is NOT Afraid Of Ghosts & Sam Wu Is NOT Afraid Of Sharks: Books 1 & 2 by Katie Tsang (Paperback)
Sam Wu Is NOT Afraid of Ghosts!:
Sam Wu is NOT a scaredy-cat (except he is). When a trip to the Space Museum goes terrifyingly wrong, Sam begins a mission to prove to the school bully, and all of his friends, that he is a fearless space adventurer.
Sam Wu is NOT Afraid of Sharks:
Sam Wu is NOT a scaredy-cat (except when he is). And when a shark TOTALLY tries to eat him at the local aquarium, he decides he's not going to take any more chances. So at his friend's birthday party at the beach, Sam refuses to dip even a toe in the water. Nothing could go wrong now, could it?