First off, All products on this website are digital, and delivered via the world wide web. This means delivery is instant. As soon as your credit card clears, you'll be re-directed to the download page.

NO "HARD-COPY" BOOKS WILL BE SHIPPED.

Having said that, Feel free to contact us anytime. Comments, criticisms, compliments, rants, we like them all.

Information Specialists, Corp.

3602 Westtown Pkwy. Suite 2006

West Des Moines, IA 50316

If you wish to contact us by telephone in the USA, then the number is 515-987-0901. Leave a message with contact information, we'll get back to you eventually. (I travel a lot)

By far, the least expensive, fastest way of contacting us is email. dsieg (at) making-biodiesel-books (dot) com

My personal email is dsieg58 (at) yahoo (dot) com

All email is answered within 24 hours. Usually hours and/or minutes.

In Vietnam:
IBS
65/69A1 Pham Van Chieu
Quan Go Vap
TP Ho Chi Minh City,
Vietnam

If you want to contact us by telephone, be aware you'll incur a hefty overseas long distance bill, in addition there is a 12-15 hour time difference (ahead...depending on where you live in the states...meaning, try not to call me in the middle of the night.) 

If that doesn't deter you, (and it should) then the number is 011-084-08-427-0663. 

The mailing address is: (Snail) Mail is iffy...sometimes we get it, sometimes we don't. "If it absolutely, positively has to get here"...Use FedEx...and cross your fingers. 

If you wish to contact us in Thailand, the address is (same rules as above apply)

IBS
100/730 Soi 49a
Mooban Chollida
Bang Bua Thong,
Nonthaburi
Thailand, 10001