SPIN (paperback) - Aliens build a shield around the Earth
If you'd like these, please comment. If multiple people want them, I'll give preference to the ones with lowest postage costs, and then flip a coin. If postage costs would exceed the cost of picking them up at your local used bookstore, I'll find a home for them locally. NOTE: US Customs requires me to get the full legal name, home address, and telephone number of recipients in the US.