An engaging mystery to unravel, with a few nice twists and surprises along the way. . . . It's a fair bet that for many the main attraction of Warren the 13th and the All-Seeing Eye will be Staehle's lavish illustrations.-New York Times Book Review
A whimsical mystery with a lot of heart and spine-tingling illustrations, this novel will circulate as soon as children open it.-School Library Journal, Starred Review
The riveting story had interesting characters, riddles, and lots of drama. Readers will get caught up in the mystery and will want to keep turning pages to find out what happens next.-Nicolas Curry, Kid Reporter for Time for Kids
Beautifully and amusingly designed and illustrated, featuring a plot filled with twists and riddles, this clever tale of mysterious goings-on at a run-down hotel proves to be an unlikely winner.-Common Sense Media, 4 out 5 stars
An adventure with echoes of classic children's titles like Raskin's The Westing Game and Dahl's The Witches. . . . Stylish, exciting, funny, and just slightly macabre, this entertaining novel bodes well for Warren's future adventures.-Publishers Weekly
All the delicious chaos of Warren the 13th and the All-Seeing Eye-first of a planned series-is wonderfully cloaked in a Victorian sensibility and design, a bit of Edward Gorey, a bit of Tim Burton.-Shelf Awareness
Just the ticket for fans of Unfortunate Events in dim corridors and murky subterranean chambers.-Kirkus Reviews
No amount of care was spared in this truly charming, wonderfully spun middle-grade adventure.-Karin Snelson, Shelf Awareness Pro
Original, funny . . . it reminded me partly of Hotel Transylvania mixed with Coraline.-Joseph, Age 11
This story is absolutely enchanting and is a must-have for any child who enjoys adventure and magic, whether this book is read to them or they read it for themselves.-New York Journal of Books
