Myth Warriors. Book. Robert Place Napton

Eric Volker is a typical skateboarding Los Angeles teenager. But everything changes when he discovers the amulet that controls Ares — an ancient, gigantic mecha warrior. Eric takes the pilot seat and becomes embroiled in an intergalactic war against the Anibus and Osiris mechs, in a battle that will decide the fate of the Earth!
Paperback: 128 pages