Note: Yesterday's Blood was the working title for the novel which appeared as Past Poisons in June 1999 from Headline Book Publishing. (source: e-mail from Maxim Jakubowski, January 2007) On March 22, 2011 the date for this title was updated from 1998-00-00 to 8888-00-00 as Yesterday's Blood was a working title for an anthology published under the title Past Poisons. The source for the 1998-00-00 date is unknown. Fantastic Fiction reports the publication date as 1987. This page reports "Maxim Jakubowski, is a publisher, editor and writer with a great interest in genre fiction including science fiction and fantasy, crime and erotica. His latest venture is a historical mystery anthology, Yesterday's Blood: The Ellis Peters Memorial Anthology which includes a number of very interesting British writers." The page is is not dated but the web server reports the HTML file revision date as November 15, 1999. Other pages in that section of the web site are not dated but contain material consistent with 1998 or 1999.