Like MartinRyan, I have them all (and I echo his hee, hee, hee!)) but they are, as Malcolm indicated, extremely fragile. It is almost impossible to open them without breaking the spine and having a section of the pages fall out. I find the only way to actually use them is to only open the book to about 90 degrees and carefully copy the relevant song out onto a separate piece of paper then use that instead. Even so, they are well worth having.