Reed Lavender Series by Ashley Capes

At least when you're Death's nephew the bad guys literally have no-where to hide, right?Meet Reed Lavender, a mostly-human detective with the uncanny ability to hear the final words of the dead. But on this case he’ll need more than his usual tricks to solve the murder of a teen runaway – he'll need something that just might be more trouble than it's worth – the help of his ragtag Reaper-cousins... moreAt least when you're Death's nephew the bad guys literally have no-where to hide, right?Meet Reed Lavender, a mostly-human detective with the uncanny ability to hear the final words of the dead. But on this case he’ll need more than his usual tricks to solve the murder of a teen runaway – he'll need something that just might be more trouble than it's worth – the help of his ragtag Reaper-cousins.But the deeper Reed digs the more he realises there's something far bigger and darker beneath his city, something vast, something that is ripening to rot... less