Albert Hofmann, who died in 2008 aged 102, synthesised LSD in 1938. Although his work produced other important drugs, it was LSD that shaped his career. Shortly before his death, Hofmann approved a new and updated translation of his autobiography (first published by McGraw Hill in 1979). It appears here for the first time in print. Hofmann's LSD will be of high interest to a wide audience of curious and scientifically minded readers. Few books about how science unfolds are as captivating and intriguing as this volume.