BoomeRangers, Bk. 1 - Dead Centre (Paperback)

The Rangers, a group of Australian animals reared in secret caves near the old Maralinga atomic test site, believe exposure to sunlight is fatal. Thirteen leave on a Quest of discovery, led by Boomer, a young rock wallaby. They discover a vast underground storehouse sealed for over a century and filled with uniforms, vehicles and weapons from a future world.
They're also pursuing Fril, the renegade leader of the Lizard tribes and once their classmate, but now on the run after attempting to assassinate their leader. While some of the Rangers test incredible solar powered vehicles outside, others are trapped below by Fril and her followers.
Tiddalick, a gigantic stone frog in tune with the Old Ones, comes to their aid, and reveals that the real purpose of the Quest is to heal the poisoned land. They decide that this new mission is more important than capturing Fril or recovering the treasures she stole.
Now equipped with uniforms that offer protection from the sun, and drug patches that allow temporary morphing into humans, they move forward and backward in time, meeting kindred spirits who have prepared the perfect cover for them - the "BoomeRangers Circus."
As circus performers they morph into "Fellers," and meet human teenagers Muzza and Germ, who become allies - but is Sir Maximus Bungarra, Australia's most powerful man, and nicknamed the "Big Goanna," to be trusted? He quickly recognizes that their revolutionary machines will change the world, but which world is it? His world of the 1950's, or their world of a century later?
Telepathically they receive notice their homeland is under attack - an event they can actually witness, replayed by the Kirra, a high-techrobot boomerang with a mind of its own. They must return immediately, but will they be in time to prevent Fril from seizing power?