My review covers the 4 books in the series, which I enjoyed. I did not find too much Christian overlay or influence, if there had been some push to preach, I would have dropped the series flat. There were some moments when one character or another would glance upwards and intone, "Please", but who is to say that's necessarily a christian motif? Not me.
There are a few time-travel gaps. There are also a couple of time-traveling criminals, looking to thwart the MC. There is some struggle over decisions. By the 4th book, the time elements collide to make a crisis of mega-proportions, and there is significant drama involved when additional characters are inadvertently caught up in the vortex. It was a bit simple, but it was effective in keeping me turning the pages long past my bedtime.
Moving onwards, this series is strong throughout the first three books. It does lose some steam towards the end of #3 and throughout #4, I kept waiting and hoping for some true revolutionary and Colonial input, but the emphasis just fizzled out and wandered off into a twilight of "perhaps". When Thomas Jefferson and Benjamin Franklin seemed to fold their cards and fade into the background noise of nuance without impact, I lost interest. The overall political and social focus was ignored for the most part and seemed to settle more on the mundane policy of horse breeding and trade.
The colonies were a hotbed of activity during this time period, but these books just skimmed over the entire war-like social restrictions and instead settled on what gowns the ladies wore, who liked to drink good whiskey and which roads were easier to travel to cover distance without killing either yourself or your horse. The action that should have propelled the story forward seemed limited and forced.
Reading became a chore rather than a pleasure, but I wanted to see how it all ended, so I continued through book 4. I was expecting some major dust-up by the time book 4 reached its end, but in that, I was disappointed. There was a brief summation and perhaps a tease for a future addition to this series, but I'm not sure I would be interested in reading it.
I have to say, there's just no conclusion. Things just stop. The future is restored. Or is it? Did the journey reach a final destination in the 18th century, or was it finished in the 21st century? Certainly, there are points from both sides to be considered. Did the time travel actually happen or was this all a mild concussion and subsequent altered state of consciousness? Suddenly, new people are added to the mix and things become cloudy again.
I did think the over-simplification of the political hazards of Colonial society was unfair. While the idea and protest of "taxation without representation" was much alluded to, there wasn't any real resolution presented. We know how things actually ended up, from this century, but how did it all happen in that time period?
We know George Washington was a farmer, not a statesman, until he felt obliged to voice his opinion. We know the Continental Army, so called but formed out of a mix of farmers, shop keepers, tradesmen, plumbers, laborers and servants, slaves who fought to win their own and the freedom of others; this was not a trained military force like the British or the Hessians, these were a rabble of people who'd had enough of His Majesty and being pushed about on soil they were breaking with their own backs. We know that "army" damn near starved and suffered catastrophic losses during the war, but knowing it from this modern perspective doesn't mean we understood it from the perspective of the ordinary troops, perhaps those quartered at Valley Forge or those who stood fast in Boston, Concord or Lexington. Some perspective from that point of view, even if fictionally enhanced or imaginative, might have made the reading more interesting.
That said, the series is worth the time to read. There was enough to keep my interest, but I did think the "invention" of the headache tablets was a bit of a stretch. Still, we buy Alka Seltzer in bulk, so maybe that wasn't too much to accept as a side effort of a stranded time-traveler looking to survive.
As for the love interest, I thought it was rather predictable. However, the subsequent trauma of an attempted rape, a miscarriage, and a murder trial with it's unpleasant outcome were all fairly dramatic and well thought out.
Throughout the books, the topic of slavery and indentured servitude is implied but not well dealt with. Glossing over such a dark time in history never serves well. I finished book 4 still unhappy with how the horror of slavery was so lightly treated. Even though the issue has been present for 5000 years, it is too important an historical topic to keep in the background. That's my opinion, and no reflection upon any other person's thoughts or comments. For the purpose of this review, the topic, in my opinion, is poorly addressed.
As a 4 book series, I thought there was more positive than negative content. I borrowed them all from Kindle Unlimited, rather than purchasing them.