A new modern Reference Grammar fifth edition by John Butt and Carmen Benjamin. Compulsory reading for students at all levels. The book is produced by Hodder Education. 589 pages. John Butt is the Emeritus Professor of Modern Hispanic Studies at King’s College London. Carmen Benjamin is a native Spanish speaker and former lecturer in Spanish at King’s College, London. Hodder Education is an Hachette UK company. The boof is a reference grammar, not a course in Spanish.