In fact, the authors critique their guide as needing more development in areas such as the topic of the advantages and limits of aquaculture. The main body of the work devotes itself to reviewed materials and additional resources. Black and white photos grace many of the pages. Crook and Zint have annotated and arranged the entries in alphabetical order by title. The grade levels span K-12.
Some materials are free.
The authors have provided a checklist of material characteristics to assist the educator in selecting materials. It also helps one understand the summary chart information, which follows. By looking at the Grade and Setting row, it is possible to identify quickly an appropriate resource title and then look it up in the reviewed materials section for a full description. This bibliography seems to be the first of its kind. Furthermore, these materials were not aimed at elementary through high school levels.