Here are my final book covers for Baseball, Basketball, Football, and Soccer. These will be printed and assembled this weekend.
For each of the covers I used a close up photo showing the texture of the sports ball, a diagram of the field the sport is played on, the scoreboard associated with the sport, and a silhouette of a person playing the sport.
Using Photoshop, I merged the images together changing the opacity, or layer blending modes. I made the covers tri-tone, using the game balls as inspiration.