A couple years ago somebody recommended Scott Meyer's Off to Be the Wizard, the first book in the "Magic 2.0" series. The premise is geek-fantasy: the point-of-view character, Martin, is a hacker who discovers a file (out there somewhere) that, when you edit it, changes reality. In other words, it's the file that defines the world and everything in it. After experimenting a bit (always meant to drop 20 pounds, that kind of thing), he decides to improve his quality of life by altering his bank balance. That's fine because he's creating money, not actually stealing it from anybody, right? No, not such a bright move, and soon he finds himself making a temporal change to escape the feds. His plan is to flee to medieval England and pretend to be a wizard. He's not the first person to think of that, or the last -- the other wizards put him through trials to decide if he can join the guild or if they'll revoke his access and send him back to his time to deal with the feds. It's a fun read.
I also enjoyed the sequel, Spell or High Water, in which we find out more about where female wizards (sorceresses) go, medieval England not being so great for them. We see more interactions among the main characters, and of course some problems they need to solve together. Another fun read.
The third book, An Unwelcome Quest, was less fun, in large part because of the setting. This is the first book where we don't see much of the world the wizards are in; an enemy wizard has caught the gang in a trap and most of the book is spent trying to escape it. Because my reaction to this one was solidly mediocre, and also because the next one existed only as an audiobook for a long time, I didn't go further. Recently I noticed that two more books were available on Kindle.
The fourth, Fight and Flight, starts with the wizards making a stupid mistake with consequences, which they spend the rest of the book cleaning up. The humor (including some actual laughing out loud) of the first book was back, and the resolution of the problem seemed to start down a good character-development path. On the basis of that, I read the fifth.
Out of Spite, Out of Mind was a major disappointment. Many of the characters' actions are just stupid, and in a not-fun way. That growth suggested at the end of the previous book is nowhere in evidence. The plot also revolves around some time-travel paradoxes that have been there since book 2 and always been a little annoying, but now they've taken over. In book 2 we met Brit the Younger and Brit the Elder, who are really the same person at different points in their personal timeline because bad things happen when you time-travel and meet yourself. They don't agree that they're the same person, by the way, and arguments about predestination break out. In this book that all ramps up, and we meet Brit the Much Elder and Angry Brit and Brit the One Hour Older and I think there's one more running around in there... and y'know what? I never liked Brit all that much to begin with. And in the process of messing with the Brits, the author messes with some characters I like and then ends with a very obvious setup for a sequel at the expense of resolving a major thread. I kind of feel like the author broke the contract with the reader here, especially since the earlier books all at least resolved even while leaving openings.
I see the sixth book is coming soon. I won't be reading it.
(By the way, I've read two other books, not in this series, by this author that were fun. Perhaps he does better with one-offs?)