Einstein's MonstersBlack holes are the best known and least understood objects in the universe. These enigmatic giants, which scientists have discovered are at the centre of every galaxy, continue to astound and challenge us. In Einsteins Monsters, distinguished astronomer Chris Impey takes readers on a vivid tour of these cosmic wonders. He weaves a fascinating tale out of the fiendishly complex math of black holes and the colourful history of their discovery. Impey