From Springer, Feb. 14, 2011:
Springer eBooks can now also be purchased via Google’s eBookstore. Google currently holds the biggest collection of Springer eBooks with more than 52,000 books, which is a combination of physically scanned books published prior to 2006 and PDF file submissions since 2006. Springer adds 4,000 newly published titles per year.
Springer eBooks are also available on Amazon for the Kindle, and in the near future Barnes & Noble for the NookStudy.com platform, Kobo Books, B&T BLIO, Entourage and Apple’s iBooks, which is now receiving books in the free and open ebook format ePub. Springer will soon also deliver books in ePub format to Amazon for the Kindle.