My husband and I have considered building a wall bookshelf niche on both sides of a window in our homeschool room.
I try to buy old books for the children for when they grow up to have a baseline of traditional knowledge. The books we have are just too valuable to remove from our home.
My wife did that and we have a ton of books that were never read.
The books that got read passionately were books for children. Hardy Boys and Nancy Drew. Later, some Newberry and Caledecot medal winners. Box car kids. Trumpet of the Swan. Famous Five.
Look for these online such as eBay. A lot of the modern versions are edited, either for political correctness or to simply dumb them down. Early Hardy Boys had a black maid, took clothes to the Chinese laundry, etc. Those are anachronisms today, but its interesting to note the historical context. More imporantly, the level of writing and vocabulary then was higher than in modern versions.