Houdini - A Pictorial Life by Milbourne Christopher (1976). It is a wonderful book filled with photographs of the master mystifier. Recently, the book was reissued in a collectors' edition. It is must-have book for anyone that likes Houdini.
I am always amazed how many Houdini photographs are unpublished and those that are unearthed. I recently came across the website of the New York Public Library. They have many uncommon Houdini photographs I had never seen before in a digital gallery.
Magicians should also type in "Herrmann" and they will find several beautiful photographs of Adelaide Herrmann.