A King Production Introduces its children line, the Princess Fever Book Series. Princess Fever Birthday Bash is the first installment of the Princess Fever Series. The series centers around Kiara, Ella and Tiffany, 3 young girls who have been best friends since they were in pampers and their fun filled journey of discovering being a little princess. In Birthday Bash, the little girls have always shared their birthday party together but an unfortunate setback may cause that to change.