Guest authors for Alpha 2017 are still being finalized. The following are confirmed:
- Tamora Pierce, bestselling author of the Song of the Lioness quartet, the Circle of Magic series, and many other fantasy novels
- Daniel José Older, author of the Bone Street Rumba urban fantasy series and the young adult novel Shadowshaper
Past author guests include John Joseph Adams, Michael Arnzen, Catherine Asaro, Holly Black, Tobias S. Buckell, Lawrence C. Connolly, Bruce Coville, Amal El-Mohtar, Timons Esaias, Charles Coleman Finlay, Carl Frederick, James Frenkel, Gregory Frost, Max Gladstone, Theodora Goss, Alan Irvine, Alaya Dawn Johnson, Kij Johnson, Scott A. Johnson, Michael Kandel, Ellen Kushner, Justine Larbalestier, David Levine, Malinda Lo, Christopher McKitterick, Tamora Pierce, Bruce Holland Rogers, Delia Sherman, Wen Spencer, Rachel Swirsky, William Tenn, Harry Turtledove, Catherynne M. Valente, Scott Westerfeld, Leslie What, Sheila Williams, and Timothy Zahn.