Books with title Scenters: A hidden world is open to them.

Twelve year old Pete stumbles into desperate trouble the moment he chomps down on that mystery root and becomes a scenter. All of us have creatures, symbionts, living inside our bodies, but only a scenter can communicate with them and obtain their help, and Pete needs plenty of help. He has no one to teach him to use his new abilities and he is forced to save himself and his girlfriend from a far more powerful, and purely evil, scenter. For kids 10 and up.