This double pack includes Whole Lotta Hearts Coloring Book Volume 3 and Whole Lotta Hearts Coloring Book Volume 4. So, that means that you get all of the heart illustrations from each of those volumes all in one coloring book. With 60 beautiful heart designs, colorists of all ages will delight in adding their own touch of color to each of the illustrations found in this coloring book. So, gather together your favorite art supplies and get ready for hours of fun as you color each of these delightful heart illustrations. The back of each coloring page has been left blank. That makes these illustrations perfect for displaying after you've finished coloring them in.