I truly will never give up on this series, although a friend warned me it gets too crazy to be believable. Gabaldon is a fantastic writer who creates terrifically memorable characters, and I have a never-ending curiosity about what will happen to them. And besides that, I find everything that happens believable, if a little insane. But the story would be no fun if things didn't get a little insane, so I find that dash of insanity entirely necessary. The scope of this series is becoming a little mind-boggling with this one, but it's only increasing my respect for Gabaldon exponentially. She handles all the plot twists expertly. 
 So in conclusion, everyone should read this series. I am making myself wait a bit before continuing with the fourth one since I will eventually run out of these books altogether. (Luckily, she's writing at least one more.)