This is a very nice book for people who are interested in multiple births in general. It's about 200 pages, and was written by a professor at Chicago University in 1940. It has chapters on twins, triplets, quadruplets and quintuplets and everything is very detailed. Some facts are not up to date though, and people didn't know as much about multiples back in those days as they do know (some ideas they had are actually quite amusing). The section featuring the Dionne quintuplets in 25 pages long, and the book has two pictures of them (which I have scanned below).