Cloak of Worlds — Jonathan Moeller

It's time to strike back.For a long time I've known that the mad wizards and corrupt scientists of Singularity keep their hidden stronghold on the ruined world of Valsidhar. So when a Valsidharien Elf arrives on Earth, asking for the High Queen's help, it's too good of an opportunity to pass up. But the Valsidharien Elves are about to lose their war, and after they fall, Singularity and its allies will come for Earth next...