The first is excellent — I’m no Lincoln expert but I do love a good biography. The second is a crime novel and beyond excellent (but note it’s the third — and last — in a series). The third should need no introduction to most readers here — I’ve been a fan of Cherryh for over 20 years and have probably read just about everything she ever published (including the stuff that’s now out of print). Hell, I even based a tabletop RPG on one of her series. And the last is a series I got into because of the TV show, only to discover that while it’s almost nothing like the show, which has deviated a great deal from the original books, they’re still cracking good stories. Who’da thunk forensics could be so interesting?