The Bone Labyrinth by James Rollins WM. Morrow/Harper Collins, $27.99, 471 pages, ISBN 978-0-06-238164-4 Anyone who’s passed by a mass-market paperback book rack has probably seen the name James Rollins, even if they have never read one of his many action-adventure yarns featuring Commander Gray Pierce and the Sigma Force Team.  In Rollins’s fictional world, the Sigma Group acts as the operational arm of DARPA:  the Defense Advanced Research