Retro Demonology Is A Demon Trapper's Bonus Story, From Bestselling Young Adult Fantasy Author Jana Oliver. Before Riley Blackthorne Can Take On Grade Five Demons, She Has To Trap Her Very First. Her Debut Solo Trapping Experience Should Be A Breeze, Just A Harmless Grade One After All. But Throw In Some Dippy Hippies (whose Peace Signs And Patchouli Really Aren't Driving Any Demons Away), One Mischievous Demon, And A Run-in With The Police, And Riley Might Not Be Able To Pull It Off...