-As usual, it can be rather dense and dry, but it's still a bit more tightly written than some of Dr. Friedman's works.
-There's quite a bit on streamlined and modernized A, S, and T class boats, as well as the HTP program.
-Most of the more esoteric material, on sonars, fire control systems, and weapons, are in separate appendixes. I don't mind this, because Friedman has a weird tendency to drop big data dumps right in the middle of the text.
-There's some fascinating recently declassified material, including detailed shipyard plans showing the machinery arrangements of the Valiant, Resolution, and Swiftsure classes, the use of narrowband passive sonar, the evolution of sonars and fire control systems, etc.
-One gets a really good idea of how stressful and frustrating it has been for the Royal Navy to maintain a modern, balanced submarine fleet in the postwar era. Amazed that any FOSM has lasted more than six months on the job.
-The "in action" chapter is rather sketchy, but there's always "The Silent Deep" if you want more.
-Bring a magnifying glass. I know Seaforth loves to cram in as much detail as possible, but I'm 36, have fairly good eyesight, and had a hard time studying the plans. Still, John Lambert's plans of the midget "X51" are mindblowingly detailed. Guy should have lived forever and done a dozen more "Anatomy of the Ship" books!