Originally published in a different form in 2002 Originally published in different form in 2019 Originally published in slightly different form in 2007 Originally published in a slightly different form in 2017 Originally published in slightly different format in 2014 Originally published in a slightly different form in 1986 Originally published in a slightly different form in 1986. First published in a different format: 2001. Originally published in ebook format in 2012. Originally published in French in 2015