The second two books in this series were an improvement on the first. The author's treatment of his characters improved with practice and experience.
This reviewer is a former deck officer (USCG reserve, not USN) with no first-hand experience in submarines. The writing seems to be pretty accurate when dealing with courses, bearings, distances, time, etc and the accuracy adds to reading enjoyment. Although, the author occasionally errs in converting yards to N.M. and plays loose with the three-minute rule. I frequently had to refer to a map of SW PAC to see where these guys were. The geography was also accurate. The account of Leyte Gulf did not quite comport with previous reading.
The books are fiction and should be read with a little tolerance thereto!
If you like, or ever liked, messing about with vessels and appreciate maneuvering ops these books are worth a read.
The first two are set during WWII and the third during VietNam.
It would be best to start at the beginning and read all three.