Terrific bio of the artist and tons of images on the Al Hirschfeld Foundation website: http://www.alhirschfeldfoundation.org/
David is the author of the celebrated book The Hirschfeld Century: Portrait of an Artist and His Age. Here's a link to just one of the glowing reviews... this from the NY Times..http://mobile.nytimes.com/2015/07/26/books/review/the-hirschfeld-century-portrait-of-an-artist-and-his-age.html?_r=0
Signed copies currently available at Stuart Ng Books: http://stuartngbooks.com/the-hirschfeld-century-portrait-of-an-artist-and-his-age.html
Admission is FREE for the exhibit (there is a parking charge at the hotel).
More info on the exhibit event here: https://www.facebook.com/events/443350299192941/