Not sure I'll read the others. I heard they're making a movie out of this and thought I'd read it. Going to be interesting to see how they do it. First person narrative requires a lot of retelling of action not seen by our narrator. Guess that's easily taken care of in film. 
 Claire is a nurse in post-war England on vacation in Scotland with her husband of eight years, Frank. Frank's a historian looking into his family history. Claire's interested in botany, particularly healing herbs. How convenient for her, then, when she gets tossed back in time two hundred years and has to rely in the knowledge she gleaned from listening to her husband and the lore she picked up. 
 Claire's found by her husband's great-great-great-something or another (grandfather or uncle, I don't remember), who just happens to bear a physical resemblance to her husband. Too bad that's about as far as it goes. While being accosted by the Englishman, she's rescued by a Scot who drags her off. She's able to help the Scotsmen who "rescued" her, but she's unable to give a satisfactory answer as to where she's from or why she's there. And why is she wandering half-dressed? So, they're suspicious. 
 Slowly, she's able to make a place for herself in the hold. All attempts she makes to get home are foiled, and generally land her in big trouble. She's married off to a Scotsman to keep her out of the hands of the English. Things go poorly for them, overall, but they have plenty of time to get to know each other and fall in love. 
 Some interesting adventures, but it reads like the author sat around thinking, "Now what horrible thing can happen to them?" The plot develops unsatisfactorily (in my opinion), in that I was left wondering what the point was. Perhaps that hangs on the fact it's the first book in a long series of long books. 
 Nice ambience, You do get a feel for the time and place. Interesting enough characters. I finished it, so that's something. Just not fascinating enough to want to run out and get the next book.