Southtown by Rick Riordan

For English prof turned P.I. Tres Navarre, business has taken a drastic turn south. But if chasing bail jumpers and adulterers are the dregs of the P.I. game, it's at least a living. The same can't be said for tracking down Will "Ghost" Stirman. The stone-cold killer has just escaped prison, spooking everyone who put him behind bars. And no one seems more worried than Navarre's boss and mentor, Erainya Manos.

All of Navarre's instincts are screaming that there's more to this case than meets the eye. But Erainya won't tell him what. That leaves Tres to dig into a twisted mystery of greed, vigilantism, and murder, where no one is completely innocent. Meanwhile, Stirman is cutting a path of violence toward an area of San Antonio called Southtown--soon to be known as hell on earth.

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