The Bobbi Brown Makeup Manual (2011) is okay for technical tips but not a good source of inspiration for looks.
Almost every look has orange foundation, white frosty shadow and a heavy dose of "healthy" blush, sometimes paired with brownish lipstick:
|she looked better before|
|she also looked better before|
If anything, this book made me want to wear less makeup.
I agree with the view (which I first saw here on xovain) that eyeshadow should generally darken the area around you eyes to bring out contrast. White eyeshadow and excessive concealer don't enhance anything -- people naturally have some darkness around the eyes anyway so it looks odd to cover it up.
However, makeup is a matter of taste and I can respect that Bobbi Brown has a signature look, even if I don't like it. Where the book goes past questionable advice and into the realm of the WTF is when Bobbi Brown tries to create other looks: