Silbury Hill: The Largest Prehistoric Mound in Europe. Edited by Jim Leary, David Field and Gill Campbell.

"Silbury Hill, the largest prehistoric mound in Europe, has long been an enigma. Set within the chalk downlands of the Stonehenge and Avebury World Heritage Site, it is traditionally thought to have been the burial place of King Sil. First investigated in 1776, then again in 1849, successive archaeological interventions culminated in Professor Richard Atkinson's televised campaign in the late 1960s. Following the dramatic collapse of the 1776 excavation shaft at the summit of the Hill in 2000, detailed surveys revealed that voids associated with the earlier excavations existed deep within the mound."

Due for publication by English Heritage on 28 November 2013 (and a bargain at a mere £75 ;-) More here.