The Tripod series is three books; The White Mountains, The City of Gold and Lead and The Pool of Fire. The books were written decades ago by John Christopher, who is a tier two, possibly tier three science fiction writer, he did the bulk of his work in the 50’s, 60’s and 70’s, and was a reasonably prolific writer. Reading his Wikipedia entry, I think he was popular primarily in the U.K..
To start with, the things I did not like about the books. First off, these books did not age terribly well. They aged better than your average Heinlein book, but they still come off as very dated. The writing itself is pretty good, its just that the books were obviously written with 14 year old boys in mind, with no thought to appealing to any other demographic, which was pretty standard procedure back then. Remember this was at a time when women science fiction writers had to pretend to be men in order to get published. The story reads a bit like Huckleberry Finn, where a couple of kids go off on a grand adventure and do things no 14 year old boy could realistically do, the characters instead rely on luck to survive. By modern writing standards this falls under the category of seriously Mary Sue writing, however at the time of the writing, this was an accepted story telling mechanic.
Now the things I did like. Reading these books from the prospective of the 14 year old boy that lives inside my head, these books were a lot of fun to read. I mean who didn’t want to be the young hero who always got the upper hand on the adults and the super advanced alien race in the story. There were quit a few just straight up fun scenes in the books and what the boys lacked in skill, they more than made up for in chutzpah. They were able to do things simply because no one ever told them they couldn’t. The books show the true innocents of the time and the generally optimistic view of the world that many science fiction writers had at the time. The author also wisely skipped much of the potentially boring stuff, like the process of coming up with a plans to defeat the aliens, instead, this was left up to the adults to do off screen, while the boys only had to deal with the fun and cools things.
Overall, this series is well worth the read, I wish I had read them when I was in High School, before adulthood ruined my sense of wonder and my need for adventure. All three books are pretty short and easy to read, I had a lot on my mind in November and December, so it took me way longer to read then it normally would have. I am pretty sure an average reader could get through them in a week or two.