Even though on first glance this might seem like a book just for "library nerd" types, I truly think anyone who has ever enjoyed childrens books would enjoy this, well, history of children's books. Tales of librarians, and how we got our "we know better than you do what you want to read" reputation. Watching publihsers go from publishing no childrens material to some to making bank off of it.
My favorite anecdote is how the early publicity for "Pat the Bunny" actually name checked Hemingway. And if you can't imagine how this could be, check this book out.