David D-Man Bergström

Hey guys in looking for a book about a boy/teen how join a silent mercenary and end up in the school were he trained and he gets in and a trainer tells him to get a stick from the woods and he picks a bendy one like rubber type and he gets beaten pretty bad and so on then learns the silent Hand speaking skill and I remember that it's some kind of stairway of stones that he needs to get upon for more respect and better classes and I remember that they live in roundhouses... For the last 7years I have been looking for this book anyone know the name of the book?