Casebook of the Black Widowers

The most complete records first.

• 
  Format not recorded · 1984Fawcett Crest · 222 pages
• 
  Format not recorded · 1980Published for the Crime Club by Doubleday · 1st ed. · 182 pages
• Casebook of the Black WidowersIsaac AsimovAsimov

  C
  Format not recorded · 1985Fawcett
• Casebook of the Black WidowersIsaac AsimovAsimov

  C
  Format not recorded · 1983Panther · 255 pages
• Casebook of the Black WidowersIsaac AsimovAsimov

  C
  Format not recorded · 1980Gollancz · Orion Publishing Group, Limited · 182 pages

Editions and their details come from Open Library, as its contributors recorded them. Publisher names are shown as recorded. See this book on Open Library(opens Open Library)