Pattern Crazy: Hundreds of Hearts is a fun adult coloring book filled with love hearts in a variety of intricate patterns to color. Pattern Crazy is a series of coloring books based on a variety of patterns created from hand-drawn art that has been digitally manipulated. Pattern Crazy: Hundreds of Hearts is the third adult coloring book in this series. There are 45 patterned coloring pages to choose from. Each coloring page is single sided, so you can use blotting paper in between and don't have to worry about your drawing bleeding through to the next coloring page. Don't forget to check out volume 1 and 2 in the Pattern Crazy series.