This is a fun read but definitely has some issues. We know that dogs don't see colors in the way that humans do, and chocolate is poisonous to dogs. Clearly the authors did not do proper research before using a dog as a narrator. Parts of this children's chapter book are laugh-out-loud funny, but other sections don't seem written for children at all (i.e. discussions of DDT, therapy, and literary works that are way above the reading level for this age group). Harold claims that Chester is his friend, but Chester never acts like much of a friend to Harold. Even before Chester stops talking to Harold, he frequently insults him. 
 Finally, there's the inconsistency of what Harold knows versus his complete ignorance at times of common, everyday things. How is it that Harold can read and translate "an obscure dialect of the Carpathian Mountain Region" but doesn't know what an area (i.e. region) is and can't recognize shaving cream or zucchini (both of which he has probably seen many times in the Monroe household)?