From the campaign page:
Altered Perceptions is an anthology of great authors, donating their work to help author Robison Wells, who's crippled by debt, caused by his mental illnesses.
Some of the authors included are: Mary Robinette Kowal, Brandon Sanderson, Ally Condie, Lauren Oliver, Sara Zarr, Brandon Mull, Jessica Day George!
There are lots, lots more, so click on through for the full list.
Related: Tanita Davis' post about the campaign.