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