There are so many unexplained mysteries to explore! From D. B. Cooper’s sudden disappearance from a flying plane to strange ghostly events at the Stanley Hotel, readers will learn educational, fascinating facts in this high-interest series.
| Title | Season | Lexile | GRL | ATOS | © | Add to Cart |
|---|---|---|---|---|---|---|
| Amelia Earhart's Last Flight | New! Spring 2025 | 480 | Q | 2.3 | 2025 | |
| The Ghost Ship Mary Celeste | New! Spring 2025 | 480 | Q | 1.9 | 2025 | |
| The Haunted Stanley Hotel | New! Spring 2025 | 530 | Q | 2.2 | 2025 | |
| The Haunting of Bell Witch | New! Spring 2025 | 560 | R | 2.3 | 2025 | |
| The Mystery of D. B. Cooper | New! Spring 2025 | 460 | Q | 4.5 | 2025 | |
| Secrets of the Sphinx | New! Spring 2025 | 470 | Q | 2.0 | 2025 |
| Title | Season | Lexile | GRL | ATOS | © | Add to Cart |
|---|---|---|---|---|---|---|
| That's Strange! (UpDog Books ™) — Hardcover Set | New! Spring 2025 | 2025 |
