The following books are included in the Grade 3 Readers package from Sonlight, a homeschool curriculum provider. These books can be purchased as a package from Sonlight or directly from Amazon or another retailer.
Clara and the Bookwagon
by Nancy Smiler Levinson
The Long Way to a New Land
by Joan Sandin
The Long Way Westward
by Joan Sandin
Prairie School
by Avi
Keep the Lights Burning, Abbie
by Peter Roop
Also: Veritas Press 1st Grade Literature
Third Grade Detectives #1 and #2
by George E. Stanley
The Chalk Box Kid
by Clyde Robert Bulla
Cora Frear
by Susan E. Goodman
Tippy Lemmey
by Patricia C. McKissack
Third Grade Detectives #10
by George E. Stanley
Tornado
by Betsy Byars
Also: Moving Beyond the Page Age 7-9
Jake Drake: Bully Buster
by Andrew Clements
Third Grade Detectives #4
by George E. Stanley
Secret Valley
by Clyde Robert Bulla
A Question of Yams
by Gloria Repp
The House on Walenska Street
by Charlotte Herman
The Littles
by John Peterson
Also: Mensa for Kids Excellence in Reading Grades K-3
The Last Little Cat
by Meindert DeJong
Riding the Pony Express
by Clyde Robert Bulla
The Viking Adventure
by Clyde Robert Bulla