Battletech Invading Clans sourcebook, by Brent Carter, Michael Pellicciotti, Diane Piron-Gelman and Sharon Turner Mulvihill. FASA Item # 1645. Pub. 1993. Paperback, 11 inches by 8.5 inches, 157 pages, including index. Very Good Condition. Clean cover with light wear on spine. Initials written on bottom page edge. Clean text block. See photos for details.