English | paperback | 144 p. | 2014
English | hardback | 231 p. | 2017
English | paperback | 220 p. | 2007
English | paperback | 358 p. | 2000
English | paperback | 522 p. | 2013
English | hardback | 192 p. | 2004
English + German | hardback | 188 p. | 2013
English | paperback | 296 p. | 2018
German | hardback | 200 p. | 1999
English | paperback | 120 p. | 2016
English | hardback | 200 p. | 2004
English | paperback | 48 p. | 1991
English | hardback | 112 p. | 2015
German | hardback | 196 p. | 1999
English | hardback | 160 p. | 2015
French | hardback | 160 p. | 2016
English | paperback | 48 p. | 2004
English | paperback | 48 p. | 2004