The Backlist Readathon [march 7-13, 2021] - hosted by jacqiewheeler

Read a middle grade backlist
Middle-grade fiction refers to books written for readers between the ages of 8 and 12, while young adult fiction refers to books written for readers roughly between the ages of 12 and 18. The terms reflect the reading level, world-view, thematic interests, and maturity of readers.

To read a book for this prompt, the book needs to be published before 2021, and have a middle grade reading level. 
All books added
The Chalice of the Gods by Rick Riordan

The Chalice of the Gods

Percy Jackson and the Olympians #6

Rick Riordan

288 pages • first pub 2023 (editions)

fiction fantasy middle grade adventurous funny lighthearted fast-paced
The Sleeper and the Spindle by Neil Gaiman

The Sleeper and the Spindle

Neil Gaiman

68 pages • first pub 2014 (editions)

fiction fantasy young adult adventurous mysterious fast-paced
Anne of Green Gables by L.M. Montgomery

Anne of Green Gables

Anne of Green Gables #1

L.M. Montgomery

382 pages • first pub 1908 (editions)

fiction classics middle grade funny hopeful lighthearted medium-paced
The Lion, the Witch and the Wardrobe by C.S. Lewis

The Lion, the Witch and the Wardrobe

The Chronicles of Narnia (Chronological Order) #2

C.S. Lewis

194 pages • first pub 1950 (editions)

fiction childrens classics fantasy adventurous lighthearted fast-paced
Willow Moss and the Lost Day by Dominique Valente

Willow Moss and the Lost Day

Starfell #1

Dominique Valente

288 pages • first pub 2019 (editions)

fiction fantasy middle grade adventurous fast-paced
Charmed by Jen Calonita

Charmed

Fairy Tale Reform School #2

Jen Calonita

304 pages • first pub 2016 (editions)

fiction fantasy middle grade adventurous lighthearted mysterious fast-paced
The Boy, the Mole, the Fox, and the Horse by Charlie Mackesy

The Boy, the Mole, the Fox, and the Horse

Charlie Mackesy

128 pages • first pub 2019 (editions)

fiction childrens hopeful inspiring reflective fast-paced
In the Hall with the Knife by Diana Peterfreund

In the Hall with the Knife

Clue Mystery #1

Diana Peterfreund

298 pages • first pub 2019 (editions)

fiction mystery thriller young adult dark mysterious tense fast-paced
A Monster Calls by Patrick Ness

A Monster Calls

Patrick Ness

215 pages • first pub 2011 (editions)

fiction fantasy young adult dark emotional sad fast-paced
The Thing About Jellyfish by Ali Benjamin

The Thing About Jellyfish

Ali Benjamin

352 pages • first pub 2015 (editions)

fiction middle grade young adult emotional lighthearted slow-paced