It’s cute.  It tells of all a young boy imagines about what his folks get up to “way past bedtime.”  He makes plans to stay up and spy, to catch them in the act, but when he creeps downstairs he finds them snoring on the couch.  However the final illustrations offer the reader hints that perhaps those sneaky parents had been up to more than they let on.  The illustrations have the look of television cartoons, which makes sense when you read the illustrator’s blurb, as that is his background.