Jillian Powell 
Code Breakers [PDF ebook] 

Brad, Conor and Scott are bored. That is, until they find the briefcase. When they discover a mobile number, it leads them from clue to clue to a cold, damp cave. But what is at the end of the trail? This hi-lo series contains intriguing and stimulating content for reluctant readers aged 12-14 with a lower reading age of 7.5-8. Aptly named Dark Flight, this set of ten short novels contain such chilling topics as soul-sucking monsters, a deadly burger bar, a girl with a stone cold stare, a ghost spaceship and a terrifying game that feels all too real. We hope that the gripping nature of these stories will allow readers – however reluctant – to achieve that sense of satisfaction and confidence that comes from finishing a book.