I've now read the first 5 books in this series -- my review for every book is/will be the same. (I wrote "will be" since I know I'll keep reading to the end of the series.) In a nutshell, these are books I love to hate. The storyline is engaging, and I definitely want to keep reading to see what happens to all the characters. Having said that, there are SO MANY historical inaccuracies that it's almost, but not quite, enough to make me walk away. Other readers have pointed out some of the obvious errors, like showers in the NYC tenements, etc. I'll point out a couple of things that just about drive me crazy: (1) the author's constant use of bad grammar in an effort to make the dialogue more authentic -- at least I can only assume that's why she uses it. Case in point, "Me and Caleb used to go there when we were younger." (OK, this isn't a direct quote, but you get the idea.) Every time I read another example of "Me and ____ did such and such" it makes me grit my teeth. (2) Getting a very simple detail like the Ides of March incorrect. In Book 3, one of the chapters is titled, "March 10, 1931," and starts off: " 'The Ides of March,' Jonathan grumbled as he carried Jean back to his bed." NO! NO! NO! The Ides of March is the 15th!!! The Ides of any month is the 15th!!! IMO, this sort of error is inexcusable. (3) In Book 2, a large chunk of the plot is "lifted" straight from the movie "Ghost." Hardly original.
OK, so it's obvious I have a number of issues with the series/writing. BUT, as I've said above, I'll keep reading to see what happens. And I guess ultimately that's what matters to the author.