Red Centre by Chris Ryan
Alpha Force - a group of five kids dedicated to fighting against injustice in the world - are in Australia, helping with a TV reality show. But when Paulo spots a dangerous terrorist hiding out in a nearby town, events suddenly force them into a terrifying adventure as the terrorist seizes hostages and flies off into the bush. Supporting the Australian SAS, Alpha Force have to take action - even if it means flying into the midst of a scary bushfire.
Good secondhand condition paperback.