Advancing Variable Star Astronomy available as a Kindle e-book

The Advancing Variable Star Astronomy book that chronicles the first 100 years of the AAVSO is now available as an Amazon Kindle e-book. Of course, hard copies are still available from the AAVSO for $80 (20% discount), while supplies last.

• Order the hard cover version from the AAVSO
  
• Order the Kindle e-book from Amazon.com