“Old Salt” asked about books on the (mainly English) Civil War.

This one covers only part of a story which is very complex (especially in its non-English elements). Still, check on Alibris.com or similar used book site for “Oliver Cromwell” by one Theodore Roosevelt, published by Charles Scribner’s Sons (NY) in 1928. Roosevelt, as might be expected, was particularly interested in Cromwell’s use of cavalry. But he included a good summary of the overall conflict.

Also interesting, on this particular thread, to see the work of the kind of man who used to be elected President. A man who not only would risk his life doing what he thought was right, but could write a coherent book on a historical figure. No long introduction praising his spouse or his publisher either. In 1928, Roosevelt jumped straight into “The Times and The Man”.