Through Lorcan Dempsey's blog, I find that David Pearson, Director of the University of London Research Library Services, has published a book about books. It goes straight onto my must-read list:
I also found the text of the first Charles Holden Memorial Lecture, sponsored by the Friends of Senate House Library, which he delivered in October 2007, on the theme, Libraries as history: the importance of libraries beyond their texts (pdf)