An experiment that began 2.8 billion years ago is about to end....

Seb Varden is starting to get used to life as a World Walker. With a body full of alien nanotechnology, the ability to travel anywhere instantly and - most surprising of all - a steady relationship with Meera Patel, things are finally looking up.

Until Seb has his first blackout, starts meeting aliens and discovers a plan that threatens the entire human race. And, of course, Mason, the most dangerous Manna user, picks this particular moment to come after him and Meera.

Scariest of all, Seb is learning his transformation into a World Walker is far from complete....

Monkeys, aliens, technology, parallel universes, music, psychopaths, A.I., a magic tech spider, The Unmaking Engine has it all, including the explanation of how all life on Earth began. Did I mention monkeys?