phenomen a book

Philian Evergrow, an orphan boy who was raised as an assassin after the Grand War of The Five Continents. At the age of 5, after his parents died from the war, he was taken by a group of slave traders, who then sold him to a group of harsh trainers that had 19 other kids. The trainers'''' goal, to make the ultimate assassin who''''d kill anything no matter how protective of a fortress that single group holds up in. However, over the 20 kids they had, Philian was the only survivor after everyone was dumped into a forest called, The Forest of Decay.