Immortal Duplicity

Edward and Bart are identical twins. But their looks are all they have in common. There is something very dark brewing among the mage ranks and Bart is in it up to his six-shooter.
Edward first encounters his long-lost brother on the prairies of 1864 Colorado. After Bart delights in the Sand Creek Massacre, Edward chases him through the decades and lands in the middle of brother's insidious plot, nestled away deep in Nazi Germany.