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