These are some books written by members of the meetup.
Q. Ethan McCallum
Andrew Gelman & Jennifer Hill
Drew Conway & John Myles White
Hadley Wickham
Daniel Y. Chen
Mike Dewar
John Myles White
Andrew Gelman
Andrew Gelman & Deborah Nolan
Richard Cotton
JJ Allaire
Jeroen Janssens
Harlan Harris, Sean Patrick Murphy & Marck Vaisman
Rob Hyndman
Jared P. Lander
Andrew Gelman, John B. Carlin, Hal S. Stern, David B. Dunson, Aki Vehtari & Donald B. Rubin
David Robinson
Andrew Gelman & Jeronimo Cortina
Tony Fischetti
Wes McKinney
Cathy O'Neil & Rachel Schutt
Max Kuhn & Kjell Johnson
JD Long
Max Kuhn
Bryan Lewis and Michael Kane
Paul Dix
Hadley Wichkam
Chris Fregly & Antje Barth
Julia Silge & David Robinson