Ever wondered about the thought process (conscious or no) behind the most eye-catching street-style looks? Journalist Josh Sims has written for the likes of i-D, Esquire and Wallpaper, and his new book, 100 Ideas That Changed Street Style (£19.95, Laurence King) is out today. We gave him five pictures of girls in more-interesting-than-your-average looks and asked him to break them down for us. Here's what he said.