You can send a letter directly to the author at asra(at)asranomani.com, though for more specific inquiries it is better to seek out the following people:

General Contact Info
Krista Holmstrom, Publicist
HarperOne
353 Sacramento Street
Suite 500
San Francisco, CA 94111
ph: 415.477.4409
Fax: 415.477.4444
krista.holmstrom(at)harpercollins.com

For Speaking Engagements please contact:
Ken Eisenstein
Vice President of Marketing
American Program Bureau
313 Washington St., Suite 225
Newton, MA 02458
800-225-4575 ext. 1612
Direct: 617-614-1612
Fax: 617-965-6610
keisenstein(at)apbspeakers.com