Beyond World's End (Bedlam's Bard Series #4)

This is your soul on drugs...
After the events chronicled in Bedlam's Bard, world-saving bard and magician Eric Banyon moves into his new New York apartment hoping to settle down to the quiet life. No such luck: his building is a safe-house for a group of occultist Guardians protecting the city from supernatural evil. And there's a new evil for them to quard against....
When unethical drug researchers discover that they can induce amazing mental powers using psychotropic drugs, they begin...