It's important to say this is truly a reference catalog, NOT a tutorial on how to draw boy clothes. It's about the size and thickness of a thin manga book too.
However, I adore this book because for at least half of the book, each page has 2 different full outfits. Then, it gets a little more detailed about the different types of sleeves, outerwear, pants, bags, hats, and glasses. The fashion doesn't get really wild, but it shows nice, casual and formal clothes you would like to see a modern anime boy wear.