It's the week of the 50th anniversary special for "Saturday Night Live," and you know what that means: all the alums are getting sentimental. Jimmy Fallon recounted what his audition process was like during Thursday night's desk segment on "The Tonight Show.

Throw in the sheer tonnage of think pieces and appreciations and other navel-gazing and you’d be forgiven for asking: Do we also need a book about Lorne Michaels? Somehow, despite all of the above, Susan Morrison’s “Lorne: The Man Who Invented Saturday Night Live” — out Tuesday — emerges as indispensable,