Chris and the Vice Squad by S R Condor

Following the success of Chris on a Bike, the second in S R Condor's Cliffstaple mysteries finds reluctant sleuth Chris Heron drawn into a mystery involving ark building, eco-terrorism and alternate-nostril breathing. 

Will Chris and Special Constable Zeta Jama uncover the truth before it's too late or will they end up like that squirrel? Dead.