My independent reading for fourth graders (and thereabouts) includes:
Little Women
Little Men
The Door in the Wall
Sounder
The True Confessions of Charlotte Doyle
Crispin At the Edge of the World (Trilogy)
Peter Pan
The Book of Virtues
Hostage Lands
Caddie Woodlawn
The Secret Garden
A Little Princess
Little Lord Fountleroy
Robinson Crusoe
Shadrach
Children’s Stories from Dickens
Hans Brinker and the Silver Skates
The 21 Balloons
Johnny Tremain
The Story of Rolf and the Viking Bow
Cheaper By the Dozen
Old Yeller
Adam of the Road
Ten Boys Who Made a Difference
The Jungle Books
Tales from Shakespeare
The Chronicles of Narnia
Call of the Wild
White Fang
Hiawatha
Castle & Cathedral
Masada (read first & edit)
Anne of Green Gables (Series)
Little Britches Series
Five Children and It
Mrs. Frisby and the Rats of Nimh
The Black Pearl
The Island of the Blue Dolphins
Bruchko
The Master Puppeteer
Beorn the Proud
Pollyanna
Otto of the Silver Hand
The Merry Adventures of Robin Hood
Bambi
The White Stag
Black Beauty
In His Steps
Five Little Peppers and How They Grew
The Witch of Blackbird Pond
The Bronze Bow
Tanglewood’s Secret
Kidnapped
The Mysterious Benedict Society
The Silver Branch
The Eagle of the Ninth
Gulliver’s Travels
All-of-a-Kind Family
Mary Poppins
Tirzah
The Adventures of Huckleberry Finn
Twenty Thousand Leagues Under the Sea
Medallion
King Arthur and His Knights
Listening for Lions
Trumpet of the Swan
Forbidden Gates
Detectives in Togas
Swiss Family Robinson
These can be tweaked according to your historical studies, obviously, since many of them are set in specific historical periods.
I require written narrations on one fiction and one non-fiction book of their choice per month.
Hope that gives you some ideas!