Book, A W Hofmann - The Chemical Laboratories in Course of Erection in the Universities of Bonn and Berlin 1866
Page from Pigot & Co. Manchester and Lancashire county directory showing Liverpool & Manchester Railway timetable, 1831 Page from Pigot & Co. Manchester and Lancashire county directory showing Liverpool & Manchester Railway timetable
Book: shortened version of A Brief History of Time, co-authored with Hawking's friend Leonard Mlodinow 2005