Head First Series is a 43-book series with 43 released primary works first released in 2003 with contributions by Kathy Sierra, Bert Bates, Eric Freeman, Elisabeth Robson, Bryan Basham, Rich Gibson, Brett McLaughlin, Gary Pollice, David West, Bart Bates, Michael Morrison, Lynn Beighley, Andrew Stellman, Jennifer Greene, Dan Pilone, Russ Miles, Heather Lang, Paul Barry, David Griffiths, David Griffiths, Dawn Griffiths, Ethan Watrall, Jeff Siarto, Rebecca M. Riordan, Al Anderson, Ryan Benedetti, Michael G. Milton, Tracey Pilone, Lyza Danger Gardner, Jason Grigsby, Jay McGavren, Raju Gandhi, Mark Richards, and Neal Ford.