The hardworking and best-selling Box has been on a two-book-per-year pace of late, alternating his popular Joe Pickett novels with stand-alone thrillers. After a rare misstep in Three Weeks to Say Goodbye (2009), Box returns with a Pickett adventure that marries the fast pace and ensemble approach of the stand-alones with the thematic concerns and reliable cast of the series. It starts when the Wyoming game wardens teenage daughter, Sheridan, receives a text message with a staggering implication: that April, the foster daughter thought dead in Winterkill (2003), is still alive. If it really is April whos texting, shes in danger, and for Pickett, the only thing worse than losing her the first time would be losing her again. Pickett must negotiate FBI politics, recruit his fugitive friend Nate Romanowski, and take a crash course in cell-phone-tracking technology to find her. The environmental theme, always part of a Pickett novel, is global warming, and while Box gets at it in a surpprising way (the title doesnt mean what you think it means), the discussion isnt as nuanced as weve come to expect. The book is, however, a successful blend of the two things Box does best and seems likely to bring fans of the terrific stand-alone Blue Heaven (2008) to this very fine series.