Tahoe Blowup by Todd Borg

When Tahoe Detective Owen McKenna's cabin narrowly escapes burning in an arson-set forest fire, the local fire department hires him to investigate. More fires follow, and people die in each one. Before Owen can close in, the firestarter kidnaps his girlfriend Street Casey. Owen has just hours if he is to save Street before she burns up in a fire so big that firefighters call it a BLOWUP.