This is a significant biography on Calder, and it's a book that Calder's legacy deserves, but if you like Alexander Calder and you are simply interested in learning more about him, I wouldn't recommend that you start with this book. It's 702 pages long and it only covers the first half of his life. It has some great photographs, but the text is pretty dry and boring and about 50% of it isn't about Calder. I'll be honest...I ended up skimming to get through it.
I would recommend that you read "Calder: An Autobiography with Pictures" by Jean Davidson, which is Calder telling his story in his own words. It's filled with wonderful anecdotes and gives you a sense of what kind of man he was. Excerpts from this autobiography are cited several times in Jed Perl's book, and they are like the pink hearts, yellow moons, orange stars, and green clovers that bring sweetness and vitality to the otherwise dry and tasteless cereal that is Lucky Charms.
There is a significant amount of supposition in Perl's biography, i.e, "Calder surely would have known about....", "We don't know if Calder (whatever), but if he had, he would have (whatever)..." etc. I began to notice this about half-way through, and that's when I looked up some reviews and saw that others had noticed it as well. The suppositions, along with the frequent excerpts from Jean Davidson's book, led me to wonder if Perl had a hard time finding new information about Calder to share with us. It's bewildering, since my understanding is that he was hand-picked to write this book by Calder's grandson, Alexander S.C. Rower, president of the Calder Foundation, so I would assume that Perl was given unlimited access to the Calder archives. Perhaps we will get some good stuff in Volume Two (yet to be published).
So...leave this one to the scholars and art historians and get yourself a copy of the Jean Davidson book and also a good retrospective such as "Alexander Calder, 1898-1976" by Marla Prather. If Calder were still around, one would suppose that he would give the same advice.
do you see what I did there? ;)