I don't read a whole lot of non-fiction, but as a big fan of Mean Girls and 30 Rock, I was pretty sure I'd like this, even before I read the glowing reviews.
Bossypants is not a very long book, and anyone expecting great revelations about Tina Fey and her life may be in for some disappointment. While Fey reveals a lot about herself through stories of her adolescence, insights into her honeymoon, tid-bits about working for Saturday Night Live, creating 30 Rock and even trying to arrange her daughter's birthday party while getting ready to parody Sarah Palin on SNL and having Oprah guest on her sit com, most of the book is observational comedy, not a tell all book about the life of a female writer and sit com creator.
It is a very funny book, however, and I frequently laughed out loud, both on public transport and in the comfort of my home (much to the annoyance of the husband, who kept having to have jokes that may not be that funny out of context explained to him). If you find Liz Lemon on 30 Rock amusing, you'll probably like this book, as it seems Tina Fey has put a lot of herself into her TV character.