Use one of the above encyclopedias for baseline information on a contemporary artist.
Often, however, artists of our time will not be included in established encyclopedias or the encyclopedia information is not up to date. Living artists will have their own website, or their gallery will have information on the artist, from which you can find autobiographical and biographical information, artist statements, sample images of recent works, their publication history and CV. For example: Gina Siepel,
See also the website of the PBS-sponsored show : ART21: Art in the 21st Century, for a full archive of interviews and video clips from all past seasons, and get a great glimpse of 21st century artists at work