I believe that all tomes only grant a single attribute point. sorry mate.
--Salineda 01:18, January 18, 2010 (UTC)Salineda
a so-called Greater Tome of the Mortal Vessel that gives +2 attribute points is available with the console code gen_im_qck_book_attribute2.uti (and works properly), but I'm not sure if it is actually used in game somewhere. --22.214.171.124 (talk) 23:33, October 25, 2011 (UTC)