I have a love/hate relationship with this book, which is being used for my 200-level zoology class.
The artwork is amazing; rather than simplified cartoons, this book gives realistic drawings with plenty of labels. It really is visually appealing (as the cover might suggest, as it is covered with beautiful images of different eyes!)
However, the text is not easy to read and absorb. For example:
"... zoologists now agree that the so-called hemichordate "notochord" is really an evagination of their mouth cavity and not homologous with the chordate notochord, so hemichordates are considered a separate phylum."
While one may assume that many of these terms - chordate, hemichordate, notochord, homologous, phylum - are already in the vocabulary of a biology student, the term "evagination" was not in my (fairly broad) vocabulary. I had to refer to another resource in order to understand the critical distinction between hemichordates and chordates. This is one of many examples where vocabulary and sentence structure are obstacles to the effective delivery of information. The author impresses us with his ability to create long sentences of convoluted structure and unnecessary, excessive use of polysyllabic terms which confound even the most attentive students.
This book describes itself as such:
"Animal Diversity is tailored for the restrictive requirements of a one-semester or one-quarter course in zoology, and is appropriate for both non-science and science majors of varying backgrounds. [This edition] presents a survey of the animal kingdom with emphasis on diversity, evolutionary relationships, functional adaptations, environmental interactions, and certainly not least, readability."
*snort*