My adult brother asked for books about the "seadog era" (he's into history).  I'm not sure what this means.  If you have books about this era on your shelf, or even if you know of books about this era, please list them on this post.  Thanks.

Don't have any books that'll work but maybe this definition will help:

The swashbuckling English sea captains of the Elizabethan era were known as"Sea Dogs".  

Maybe either of these series may be suitable. They are fiction, unsure from your post  if he was looking for fiction or non-fiction works.

By Force of Arms (Revolution at Sea Trilogy/James L. Nelson, Bk 1)

The Guardship - Brethren of the Coast, Bk 1    Author: James L. Nelson

Alos, maybe a post in either the history, of historical fiction forum may garner you more responses.

Phil, you might look under patrick o'brien, dunno whether your bro is looking for actual history books though, which this is not, you may know o'brien as the author of "Master and Commander" which was made into a movie, but he has written so many great historical sea faring novels----british naval adventures----and the historical detail is excellent:

http://www.paperbackswap.com/Patrick-OBrian/author/

I have 4 Aubrey/Maturin books by Patrick O'Brian. All four for two credits.