Flaca, or Detective Flaca as she prefers to be called, is pleased with her Christmas gifts. Finally, she has the tools needed to do her job: a fingerprint-taking kit, a police-quality mini flashlight, and most exciting of all, police tape to block off crime scenes! However, she is not at all pleased with the airline tickets to Puerto Rico she and her sister La Bruja are given. She has case deadlines to meet! La Bruja isn't very happy either since their grandmother's house doesn't have air conditioning, cable TV or Wi-Fi.

Their parents are sure the girls will enjoy celebrating Three Kings Day, a huge holiday in Latin America that takes place on January 6 and involves putting grass in a box under the bed for the wise men's camels. Three men on flying camels sounds very suspicious to Detective Flaca, who once again is faced with a case begging to be solved. Where do the Three Kings get the gifts to put in the boxes? Do they steal presents from Santa Claus? Or do they take them from under Christmas trees around the world?

The skinny second grader first introduced in The Case of the Missing Chancleta and Other Top-Secret Cases / La chancleta perdida y otros casos secretos is back on the case in the second installment of the bilingual series, The Flaca Files / Los expedientes de Flaca. Narrated by Detective Flaca in hard-boiled detective style, this short, bilingual novel for intermediate readers will appeal to seasoned and reluctant readers alike.