Amazing Amazon Deal -- Deep Sky Companions: Hidden Treasures $18.40

Thanks goes to the 10 Minute Astronomy blog on this one. 

Amazon has a clearance sale on Deep Sky Companions:  Hidden Treasures for the low, low price of $18.40.  Books in this series are around $46 new, and  rarely break the $25 mark used.  As of this posting, only 6 more left in stock.