"A must-have series for middle-grade readers." -- Booklist No Rules , the fourth book of R.A. Spratt's hilarious Friday Barnes Mystery series, brings even more trouble for this genius girl detective. Friday Barnes has been deported to Switzerland . . . but we need her back With their go-to detective gone, Highcrest Academy has descended into chaos. Someone's fired all the teachers as an epic prank, and suspicion falls on Ian Wainscott, Friday's nemesis (who's also desperately in love with her). There's also the problem of the new vice principal and his questionable behavior. It's hard to take someone seriously when he's wearing tie-dyed shirts, right? Can Friday prove Ian's innocence, find the prankster, and save her school? If it involves running, then probably not, but otherwise . . . Friday's on the case