No One There (Sofia Blake FBI Suspense Thriller, #1)

FBI special agent Sofia Blake, with a Ph.D. in linguistics, can decipher any hidden codes, messages or foreign languages the Bureau sends her way, finding patterns where others cannot and making her indispensable in tracking down the most heinous of serial killers.
When a prominent community member is found dead with a cryptic note during the annual Dia de los Muertos celebration, Sofia must crack a cypher that only she can solve—if she can do it in time to save the next victim…