So book 3. Two years after "The Crisis," a bomb that causes an EMP (electromagnetic pulse) that wipes out everything electric/ electronic/ everything with a chip. This bomb only affected Ireland, Scotland, Wales, to a lesser extent England, and in the US, only Boston was bombed. So now finally the Yanks show up to bring their people home. They show up as typical Yanks: over paid, over fed, over sexed, and over here. They seem to have a single minded focus on bringing Americans back home and no thought of helping our UK allies rebuild. (Does it make sense that two years after the bomb, all electronics are still out, including new ones that might be built? Seems like maybe, sort of.)
So two plots wind through this one: Is Sarah going to take her son John and go back to US? They have built a new life in Ireland, with close friends, a community, a wholesome lifestyle with lots of bread baking, crops, horses. John is a responsible young man instead of the video game obsessed teen he was in the US. And Sarah is in love with Mike, the exceptionally hunky Irish man she has been flirting with since the beginning of the series. Two years later they still haven't consummated or solidified their relationship.
The second plot is that Mike who founded this community and named it after himself (Donovan's Lot) has set himself up as the boss. He frequently says "this isn't a democracy" and spends his days giving orders, assigning tasks. So a trouble making stranger rides in and starts stirring up rebellion against Mike's autocratic rule. Will Mike be able to maintain his leadership role or will Brian succeed in taking over? What will happen if he does?
There's also a new love interest for Mike. If Sarah is leaving for US, Aideen is ready and willing to step into her spot. Sarah's first reaction when the Yanks show up is "oh yay, we are going home!". It takes her an exceptionally long time to even think about what they would be leaving behind. (Sarah does come across as kind of slow witted at times )
Both of these plots have a lot of back and forth. The villains are extraordinarily villainous. The reactions of the ordinary people of Donovan's Lot are a bit hard to fathom. All the way through a heaping helping of suspension of disbelief is required, but the ending is always obvious. The book is entertaining, but barely. On a scale of buy it, borrow it or don't bother, it is solidly borrow it.