Books in The Lost Bookshop series

One of the chosen has gone renegade. Turning his back on all that he once believed, Billos enters the forbidden book and lands in a reality that is as foreign to him as water is to oil. A place called Paradise, Colorado--where he discovers he has strange new powers given to him courtesy of a mysterious figure known as Marsuvees Black. The chosen four have survived the desert, escaped the Black Forest, battled the Horde, and added a spirited refugee to their number. But nothing has prepared them for the showdown that Billos, the renegade, will lure them into.

A final quest and an ultimate betrayal. Deep in the mountains of Romania stands a fortress, and deep within that fortress lies a chamber. In that chamber, ruling the dead for over two thousand years, lives one Shataiki bat straight from the bowels of the Black Forest. He seeks the final Books of History with which he will destroy the world. But there are four who stand in the way. The chosen are trapped in a new world of high technology and weapons of mass destruction. In the midst of chaos, they must find the last book before the Dark One can in this epic battle that crosses worlds, tests allegiances, and plays for keeps.