I will start out with a positive notes about the stories. I think the unique friendship between the cat and the kangaroo is sweet. I like the fact that Oliver is allergic to mice but he still likes to chase them and let them go. The pictures in the book would definitely capture any childs eye. Over all the storylines are simple and would be easy for a young child to understand.
I have two constructive criticisms for the author - many of the pages have A LOT of text, all boxed together---even if the same amount of words were separated throughout the page I think it would be a better look-- also the approach to some of the topics may not go over very well with many parents...a smoking hog, while Oliver points out its a gross habit-I think the picture of the hog with the cigar is unnecessary--just smoke coming from the side of the page would have go the idea across with out the cigar being shown. Also later in the story Oliver comments he likes to flatter Jumpy because most girls like it--I think really EVERYONE like to be flattered now and again.
Over all I give the collection a 4 of 5 stars.