Science Based E-Books

I'm also writing and publishing science based ebooks. These can be found on two different sites:
http://www.currclick.com/index.php?filters=0_0_0&manufacturers_id=142 and
http://www.theoldschoolhousestore.com/index.php?manufacturers_id=139&zenid=35ad51bd8494d8e1f19ceaaa13e7d6dc&main_page=index.
I've got six on one site and seven on the other. I hope to have some more up and available before the year is over. I'd like to get back to my full-length science fiction novels. I'm afraid that they'll have to wait until next year. "Astronaut Training" is selling but not as well as I would wish. I have high hopes for the second book. Let me know what you think when you read it. With everything that a person has to do it's difficult getting time to write. It's probably the same for everybody. It forces us to make the most of what little time we have.