Piers Anthony 
Mute 

Interstellar adventure awaits an unlikely hero when he’s recruited to save the galaxy in this thrilling space opera from the bestselling author.Mute is science fantasy of mutation and psi: special mental powers. The protagonist, Knot, is a double mutant: He has a physical deformity, and the psi power to make others forget him. He’s satisfied with his life—until the lovely Finesse walks into his life to recruit him for a dangerous galactic mission. She is aided by two small animal mutants: a telepathic weasel and a clairvoyant crab. Knot tries to resist, aided by his psi, but the woman’s beauty and the animals’ powers doom him to a phenomenal adventure.   The prior edition was cut; this is the complete version.