Jack Slater and the Whisper of Doom by John Dougherty
Random House ISBN 9780552558051
Jack Slater, Monster Investigator, hasn't come across a monster he can't beat. However he hasn't met one like this before. How will he deal with the Dark Depths, where the most terrifying monsters lurk? And can he defeat the mysterious Mr Whisper? Can Jack and his friends survive the dangers they are faced with?