The Jungle Kingdom, Book 4: Volume 3 (Library Binding) (ISBN-13: 9780760394281)

Stud races through the jungle, at last finding his way to the Jungle King.

But Brutus Elephant? will defend his throne and gain the Kingdom Maps at any cost. Nothing can stop him in his quest for vengeance. Meanwhile, Brymm reveals a great hidden power in her fight against the gorilla squad. Memories of her own father convince her to stick by Stud against the Jungle King. Will Stud recover the Kingdom Maps from Brutus Elephant? before it's too late?

Hammer
Stud is a 14-year-old boy with the unusual ability to turn his hands into hammers. With a father who often abandons him to go on expeditions, Stud fends for himself while trying to achieve the goal his father has told him is the most important in life: to make a true friend. Unfortunately, the other kids in his town shun him for being weird, so he goes on his own adventures and finds true friends along the way.