Biography Wikipedia
Wikipedia:
A lookbook is a collection of photographs compiled to show off a model, a photographer, a style, or a clothing line. It is an especially popular term with "fashion bloggers".
Lookbooks in their online form can be described as "fashion diaries" because bloggers are constantly updating them on a daily or weekly basis. However, sometimes they are made to compile the looks of other people such as a celebrity, politician or socialite. They can also be used as an artist's portfolio.