It is "that book" that we reach for over and over, as we learn about the seasons, history, math or grammar. Sometimes we learn a poem by heart by reciting and copying it, sometimes it is just the reading for the day.
I am a lover of poetry, so I love that I can find works by the great poets of times past as well as lesser known painters of verse. There are poems about the weather, animals, numbers, love and war. When I want a little teacher inspiration, I look to verses by Steiner. When we need a new grace to remind us to be thankful for all that we have, I look here. And sometimes I look for ways to tell my children how much trouble they are in or how much I love them in new words. This is the book I pick up first.