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