Ricketts' subsequent book, "Sea of Cortez", is almost two separate books. The first section is a narrative, co-written by Steinbeck and Ricketts (Ricketts kept a daily journal during the expedition; Steinbeck edited the journal into the narrative section of the book). Later, the narrative was published alone as "The Log From the Sea of Cortez", without Ricketts's name. The remainder of the book, about 300 pages, is an "Annotated Phyletic Catalog" of specimens collected. This section was Ricketts' work alone. It was presented in the traditional taxonomic arrangement, but with numerous notes on ecological observations.