Brad Meltzer's Viper One Blue Suit, The Funeral Home And The Murder

Andrew Fechmeier is a master at hiding. He'd better be—he’s spent decades concealing a secret that could get him killed. So when he’s diagnosed with a terminal disease, he heads for the local funeral home carrying the blue suit he eventually wants to be buried in. But what no one knows is that Fechmeier secretly tucked something inside, turning the suit into a final, untraceable hiding spot.
 
It's a perfect plan. Until Fetch is brutally murdered by a mysterious killer who will stop at nothing to find the priceless object hidden in the suit.

What follows is the best-reviewed book of Brad’s career—a gripping plot filled with twists and turns, and the character everyone calls his Girl with the Dragon Tattoo. 
 
If you’ve never read Zig and Nola, this is the perfect jumping on point.