This is Lion Heart by Luis. This book is a full-on sci-fi as there are realistic and alienated characters. In this book, the main character’s name is Sifty, who has a close comrade called Jim. The antagonists in this book are Mr. Eclair and the mad scientist. Sifty is just an ordinary worker in a zoo when the mad scientist creates an ultra species with special abilities… Sifty will have to choose, either to hold back on the world, or reveal his secrets.