Pacey Packer, unicorn tracker

Twelve-year-old Pacey travels through Rundalyn to rescue her little sister, Mina, who was taken there by Slasher, her unicorn-turned-plush toy, who hopes to regain his rightful form and place in society.

"Pacey Packer and Slasher look for the evil Alpha Unicorn's horn and try to escape Rundalyn's Dark Caverns--but mean mermaids may pose a challenge"--