Violets Are Blue

This is an okay book written by James Patterson. When two joggers are found hung by their heels and drained of blood, Alex Cross must consider the possibility of vampires at work. He must descend into an underground subculture where people even change their teeth to look like a vampire. Two depraved brothers and their “Sire” are on a nationwide killing spree. The mastermind of the murders is someone very close to Alex Cross. This is the 7th book in the series.