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Great book! I can't wait to read the next ones! It's a good mystery, with excellent villains and believable protagonists, one boy and one girl, both aged 11. The narrator really keeps you in with lots of hidden messages and things he "can't say." I think students will really like it. It was recommended to me by a male student who is a big reader, and I am glad I was able to read it!
adventurous lighthearted fast-paced
Plot or Character Driven: Plot
Strong character development: No
Loveable characters: Yes
Diverse cast of characters: No
Flaws of characters a main focus: Yes

Fun, Lemony Snicketish with codes, magic, etc.

I enjoyed the snarky tone of the book and the intrusive narrator. Some of my students have really liked this book, but others couldn't get into it.

once in 4-5th grade, once in 8th grade

Very strange, but very good. I liked the characters, and the notes from the author were hilarious!
adventurous emotional funny mysterious medium-paced
Plot or Character Driven: Plot
Strong character development: Yes
Loveable characters: Yes
Diverse cast of characters: Complicated
Flaws of characters a main focus: No

An absolutely delightful start to a charmingly clever series. The cheeky, fourth wall-breaking narrative style really wimmerses the reader and makes you feel like you're a part of the adventure. Cass and Max-Ernest are the most compelling 11 year olds I've ever met, delicately walking the line between being too childish to enjoy reading about and too mature to be realistically (by fantasy fiction standards) 11. Even reading this as an adult, there's plenty of jokes, riddles, and plot twists that keep my on my toes. I'm very eager to continue the series.


This book was really amazing.
I liked the way that the author kept everything so secretive and unexplained.
I liked chapter thirteen because the number thirteen was crossed out and replaced with a simple 14.
My favourite character was Cassandra because I thought she was brave and I liked her big elf ears.

My ten year old daughter recommended this book. She read it in two days and gasped and giggled all the way through. This is a quick moving,fantasy adventure with interesting references to people and ideas throughout history. The narrator's conversational style includes humorous footnotes and asides that make readers interested in learning more. I'd tell you exactly what the book is about, but, as the title states, it's a secret you'd be better off not knowing. Read it if you dare!

Fun little YA read. Good for middle schoolers.