Shadow of Dark Queen: Book One of The Serpentwar Saga

A dread darkness is descending upon a great land called Midkemia-a powerful and malevolent race of monsters that has slipped through a hole in the dimensions. And two unlikely young heroes-a bastard heir denied his birthright and an irrepressible scoundrel with a penchant for thievery-must take up arms in the struggle to protect their besieged world; two friends chosen by Destiny to stand at the fore of the battle that is to come against the gargantuan reptile army of the terrible Emerald Queen.