He co-wrote "Sea of Cortez" with marine biologist Edward Ricketts, the model for Doc in "Cannery Row"
... longer guidebook co-authored by 
Steinbeck & Ed Ricketts that was simply called SEA OF CORTEZ and includes 
both illustrations... [DOC] [TLE] Voyage will retrace Steinbeck-Ricketts trip to Sea of Cortez [PAR] Dec 3, 2003 ... --from Sea of Cortez, by John Steinbeck and Edward F. Ricketts (1941) ... a 
marine biologist and photographer who serves as science director and ...