(I'm going to post as I write for this one, but it's likely to be very slow.)
The preludes, following each major character(s) as they converge at the scene of the crime:
Tendou Kasumi - "Kasumigeddon"
Hakubi Ryouko -
Aino Minako and Mizuno Ami – "Ami's Lies"
Yamazaki Linna and Ozora Mirai - "Research"
Kasuga Kurumi and Kasuga Manami
The investigation – "The Herstory Murder"
The real investigation – "The Herstory Challenge"
Revision history:
2001 August 15, initial version for publication from existing notes
2002 April 21, added link to "Ami's Lies"