My children, even the teenagers, re-read these books every year. We put them away at the beginning of Epiphany and only pull them out at the beginning of Advent, and the family is always overjoyed to see them again. On St. Nicholas' Day every year, I give them a new Christmas book. For those of you in the United States, you should be able to find these at your local libraries. For those overseas, it may be hard to access as easily. I would be glad to give you my top recommendations based on your ages of children if you can only purchase a couple.
HAPPY READING!
A
Alexander, Lloyd

The Pyrdain Chronicles Box Set
Several books
Gender: B
Level: 3, 4
B
Banks, Lynne Reid

The Indian in the Cupboard
And sequels; one of them has some weird spiritual aspects—may want to skip that one
Gender: B
Level: 2, 3
F
French, Allen
Excellent boy stories!

The Story of Rolf and the Viking Bow
Gender: B
Level: 3, 4

The Red Keep
Gender: B
Level: 3, 4
H
Harrison, Michael

Don Quixote
A retelling of the Miguel de Cervantes tale
Gender: B
Level: 3
J
Jacques, Brian

Redwall
21 books, all in the series. Great boy books!
Gender: B
Level: 3, 4
Jefferies, Richard

Bevis, the Story of a Boy
Written in 1906
Gender: B
Level: 3
L
LeFeuvre, Amy

Teddy’s Button
Written in 17th century? republished by Lamplighter Publishing. Great boy story!
Gender: B
Level: 2, 3