Book One: The Shadow Cipher
This looks steampunk, but it isn't steampunk. It's more like National Treasure (2004), in that there's a bunch of clues hidden in old stuff to find a secret treasure that nobody thinks exists except some random weird people. But with kids, because this is middle-grade-ish fiction.
I call it "middle-grade-ish fiction" because it is 476 pages long, too long for junior fiction, but it's shelved in the kids' section at the library (making it not YA) and it's cleaner than much of the middle-grade fiction I've been reading.
(Ew, I just realized that the average cleanliness for middle-grade fiction is way worse than it should be.)
The main characters, Tess and Theo, are treasure hunting because (they think) if they prove the secret treasure exists, they can save the building they live in from being demolished. |Except they don't find the treasure in this one. Instead, they end up unleashing a bunch of robotic moths that blow up the building they're trying to save|.
Videogame and star ratings for this book as an individual: E10+, 4.
Book Two: The Clockwork Ghost
There is no actual ghost here. There is clockwork, though; the main characters have to |stop the giant clock in not-Grand-Central-Station for one of the clues|. Except they end up |releasing a bunch of robots|. Again.
This one is basically like if the author said, "I see you read The Shadow Cipher. Do you want another The Shadow Cipher?" Which was fine, because I did actually want another The Shadow Cipher. This does mean I don't really have much to say about it, though.
There is one new character who was quite funny: Ono, the tiny Rubik's-cube-sized robot. He's named Ono because he can say exactly two things: "Oh no" and "To the land of kings" (well, he can drop words from the second one, making things like "Land of kings" or just "Kings"). Also, he occasionally does helpful transformation-y things like turning into a ladder.
While this is the middle book in a trilogy, it's not the one where everything goes all terrible. I was glad of that.
Videogame and star ratings for this book as an individual: E10+, 4.
Book Three: The Map of Stars
That gave me a sense of impending lameness, and then it was fine, and then it was confusing.
It involves |time travel, and possibly parallel universes? I'm not actually sure. As I said, it was confusing. I did like the hints that Tess and Theo traveled back in time to set the whole clue thing up for themselves; it made the first two books a lot more believable with their "we keep finding all the clues first try and never run into dead ends or tangents"|. Although they are just hints, if strong ones; we never get anything definite.
And I'm honestly not sure what the title is referring to. Maybe I missed that part?
Also, |I don't know if the treasure actually exists, but I don't think so. They never find it, anyway|. The last third-ish was confusing. If you've read these and understood that bit, please tell me what's going on, because I don't know.
Videogame and star ratings for this book as an individual: E10+, 3.
Were it a videogame, I'd rate the series: E10+ for tense scenes. This would actually make a pretty good puzzle game.
(Endnote: In case you couldn't tell, this is set in an alternate version of New York City.)