The best way to reach Donn is via email.
Feel free to phone him anytime at his office number, but you will probably get his answering machine. If so, just try again later.
Sorry, he does not post his cell phone number online.
Email: [email protected]
Phone: (864) 399-9583
Snail Mail: 100 White Meadow Ct, Simpsonville, SC 29681-6612