Earthdivers (Earthdivers #6)

When Indigenous survivors Tad, Sosh, Emily, and Yellow Kid plotted to reverse the apocalypse by stopping the creation of America, their wildest dreams couldn't have prepared them for the consequences of interfering with history. Now the mission to kill Christopher Columbus comes to a close, but whose blood will spill when the Santa Maria finally hits shore? And where-when-will the desperate time travelers go when their efforts in 1492 backfire?