So Dragonfly in Amber by Diana Gabaldon is the second book in the Outlander series and was a pretty good book if not a little too long since I felt the middle of the book kinda dragged along. In all it was an awesome read and very detailed, the world building is excellent and the character development is great. 
 In summary Claire is telling her daughter about the events that lead to her being in back to her own time period. This means the beginning and end of the book is set 20 years later which was an interesting technique. The book delves into the bonnie prince Charles uprising and the battle of culloden. Jamie and Claire are fighting to stop Prince Charles from leading the Scottish to their deaths in Culloden 
 If wary about continuing the series i'd say give it a read but don't expect it to be a quick read because it isn't. Expect to put some serious hours in to get a good way through since it is a good 900+ pages. I probably won't read the third book for a while to give myself a break from the Outlander series but I would do the same for A song of ice and fire between books so it is not because there bad.