A - Richard Kadrey: author of the Sandman Slim novels and more.
B - Tom Sniegoski (also drew the wolfish monster): author of the Remy Chandler novels, The Fallen series (YA), and more.
C - Roger Ma: author of the Zombie Combat Manual.
D - Aaron Rosenberg (also drew self-portrait): author of The Scattered Earth and more. Also a game designer.
E - Jim Butcher (also added eyebrows to bat!): author of the Codex Alera series and the Dresden Files.
F - Seanan McGuire: author of the October Daye series.
G - Joe Abercrombie: author of the First Law series, Best Served Cold, and Heroes.
H - Mira Grant: author of the Newsflesh Trilogy (yes, I know this is Seanan McGuire).
I - Anton Strout (also drew the monster): author of the Simon Canderous series.
The bat is in a safe place and will eventually be archivally framed.