From the New York Times:

According to two publishing executives who participated in meetings, Mr. Martin’s parents, Sybrina Fulton and Tracy Martin, said they intended to write a book that gives the full picture of their son while tracing their own experience of shock and sorrow.

Unarmed Florida teen Trayvon Martin was shot dead by George Zimmerman in a neighborhood altercation in 2012. Zimmerman claimed self defense and was acquitted of all charges related to the incident