Grumpy Monkey by Suzanne Lang Grumpy Monkey Party Time! by Suzanne Lang Grumpy Monkey Up All Night by Suzanne Lang Grumpy Monkey Oh, No! Christmas by Suzanne Lang Grumpy Monkey Book and Toy Set by Suzanne Lang Grumpy Monkey Valentine Gross-Out by Suzanne Lang Grumpy Monkey Don't Be Scared by Suzanne Lang Grumpy Monkey Spring Fever by Suzanne Lang Grumpy Monkey Play All Day by Suzanne Lang Grumpy Monkey Mom for a Day by Suzanne Lang