The favorites of my youth: Leatherstocking Tales (edited: James Fenimore Cooper). The Horatio Hornblower series of books (British navy in the 1700s). And a series about salvage operations in the Red Sea and North Africa during WW II.
Update:
The Leatherstocking Tales, all written by Cooper between 1823 and 1841, include:
The Pioneers (1823),
The Last of the Mohicans (1826),
The Prairie (1827),
The Pathfinder (1840), and
The Deerslayer (1841). Two of those Cooper novels were made into movies: "The Last of the Mohicans" (starring Daniel Day-Lewis), and "The Deerslayer," starring Lex Barker, Rita Moreno and Forrest Tucker.
The 17-volume Hornblower series of books were written by C S Forester. Forester wrote over 40 other fiction and non-fiction books, the most well-known work being, "The African Queen," which was made into the movie starring Humphrey Bogart and Audre Hepburn, and another novel about the WW II search-and-destroy actions of the British Navy which was the basis for the movie entitled, "Sink the Bismarck."
https://en.wikipedia.org/wiki/C._S._Forester
The author of the salvage operations books was Rear Admiral Edward Ellsberg. He wrote numerous books on his active duty tasks both in the Red Sea (early in WW II) and thereafter. In 1944, Ellsberg was sent to England in time for the
Normandy Invasion, where he was instrumental in setting up the
Mulberry harbour off the Normandy Beach. His 1931 book on WW I submarine operations entitled "Pig Boats" was the basis for the movie "Hell Below" starring Robert Montgomery, Robert Young and Walter Huston.
https://en.wikipedia.org/wiki/Edward_Ellsberg