A Droga do Amor (A Love Drug) is a book by Brazilian writer Pedro Bandeira in 1994 by Ed.Moderna.

[1] The fourth volume of the Karas series begins when students at Colégio Elite are on holiday at the end of the year and Magrí, the only girl in the class, is in New York preparing for the World Gymnastics Championship.

To make matters worse, Doctor Q.I., the king of criminals, escapes from the Maximum Security Penitentiary.

Magrí, the only girl in the class, is the one who faces all the risks to unravel the mystery.

Further suggestions might be found on the article's talk page.