We love reading, Magic Tree House Books by Mary Pope Osborne. Many of the Magic Tree House books also have wonderful research guides to go with them. Full of “facts behind the fiction” (the back of the book Leprechauns and Irish Folklore) they have lead to so much more learning after finish the story. My son spent an entire year studying the revolutionary war after reading a Magic Tree House book. It was wonderful, I love self directed learning!!
They are chapter books but we often read on is a sitting if i am reading it, it takes about 30 minutes. We enjoy reading the research guides often the next day. We then continue to learn more about the topic. I often follow my children’s lead to how far we take the learning.