Every. Single.Day. Oscar Wild the cat, sniffs his food dish and finds it full of delicious food. 
"YUM!” his tongue dribbles. "YUM.”
One morning, his dish is empty. Oscar Wild finds ONLY biscuits crumbs in his dish. “There is a food thief in this house.” He roars. 
 
This is a mystery book: WHO DID IT? Be aware of serious nail-biting.