Tina Fey may face the same Mommy-track fears of any working parent, but how many of us (1) can make a living imitating a potential presidential candidate, (2) have to worry about getting Oprah to appear at our workplace, and (3) can write about all of the above in a fashion that is positively sidesplitting? Only Tina Fey, and that's why you probably do need to buy her memoir.