Bella Street and her tech-wizard friend Felix Samson have been placed in the Witness Protection Program to keep them out of Doc Gutson's evil clutches but the Doc has hired the worst of the worst, Marky Blue-Eyes and Carlos the Moose, to track them down. Will Bella and Felix manage to stay one step ahead of the Doc and her henchmen? Will Bella and Felix ever find out what Excalibur is? What will Johnny Sequins and Pauly Three-Toes do if the Doc finally goes off the deep end? All good questions. One thing's certain, it won't be over 'til the fat lady sings... The third instalment of the Tween Noir Bella Street Mysteries series â€" think Derek Zoolander meets Sam Spade. Praise for 'A Bella Street Mystery: The Secret Formula' 'Best book I’ve ever read! I LOVED it and wish there was a movie ... VERY suspenseful.’ Jolie Wilson, age 12. 'A ripper of a thriller for kids!' Irina Dunn, Director, Australian Writers Network.