Book excerpt: Presented at a symposium held in 1990 to celebrate the Getty Museum's acquisition of the only known illuminated copy of The Visions of Tondal, twenty essays address the celebrated bibliophilic activity of Margaret of York; the career of Simon Marmion, a favorite artist of the Burgundian court; and The Visions of Tondal in relation to illustrated visions of the Middle Ages. Contributors include Maryan Ainsworth, Wim Blockmans, Walter Cahn, Albert Derolez, Peter Dinzelbacher, Rainald Grosshans, Sandra Hindman, Martin Lowry, Nigel Morgan, and Nigel Palmer.