_Solar Labyrinth_ for sale

Folks, I've managed to acquire a duplicate copy of Robert Borski's Solar Labyrinth. If anybody on the list would like it, I'm asking $20 including insured Priority Mail shipping to the U.S. Non-U.S. buyers pay $15 plus actual shipping. If you live around Boston and would like to arrange local pick-up, the cost is $15. I'll accept payment via PayPal, money order, personal check, or, in appropriate circumstances, cash. Best, Mark Millman