My books promote Graph Theory, Computer Science, and Troy University around the world.
Besides the USA, they are on sale (in alphabetical order) in: Argentina, Australia, Austria,
Brazil, Bulgaria, Canada, China, Croatia, Czech Republic, Denmark, Estonia, Finland, France,
Germany, India, Israel, Italy, Japan, Netherlands, New Zealand, Norway, Poland, Portugal,
Romania, Russia, Slovenia, South Africa, South Korea, Spain, Sweden, Taiwan, United Kingdom,
and other countries.
For multiple websites, click
here,
here,
and
here.