Mysteries of Trash and Treasure books in order A series by Margaret Peterson Haddix
The Mysteries of Trash and Treasure series by Margaret Peterson Haddix has 3 books (2 novels and 1 shorter work), from The Secret Letters (2022) to The Stolen Key (2024). Read it in order, starting with The Secret Letters.
Reading order: 1 The Secret Letters (2022) · 2 The Ghostly Photos (2023) · 3 The Stolen Key (2024)
Updated September 2026
All 3 Mysteries of Trash and Treasure books in order
- 1.
The Secret Letters (2022)
- 2.
The Ghostly Photos (2023)
- 3.
The Stolen Key (2024)
Mysteries of Trash and Treasure FAQ
- How many Mysteries of Trash and Treasure books are there?
- There are 3 Mysteries of Trash and Treasure books, as of September 2026.
- What order should I read the Mysteries of Trash and Treasure books in?
- In publication order, starting with The Secret Letters (2022): 1 The Secret Letters (2022) · 2 The Ghostly Photos (2023) · 3 The Stolen Key (2024).
- What is the first Mysteries of Trash and Treasure book?
- The Secret Letters (2022).
- What is the latest Mysteries of Trash and Treasure book?
- The Stolen Key (2024).
- Is the Mysteries of Trash and Treasure series finished?
- No, Margaret Peterson Haddix is still adding to it.
- Did Margaret Peterson Haddix write other series?
- Yes: Shadow Children, The Palace Chronicles, The Missing and The Greystone Secrets.
More series by Margaret Peterson Haddix
All Margaret Peterson Haddix booksShadow Children
7 books
The Palace Chronicles
3 books
The Missing
8 books
The Greystone Secrets
3 books
Sources: series order and dates from Wikidata and Open Library. Last updated September 2026.