Torbjorn Tanssjo’s teaxtbook is one of the five I recommend in my bibliography. Tanssjo is a moral realist – and here’s a review of his new book on moral realism (a cognitivist justification of moral truth which can be known by reason or experience). PB

http://ethicalrealism.wordpress.com/2010/07/14/moral-realism-by-torbjorn-tannsjo/