We have access now to hundreds of Springer ebooks. The cataloging department is working on getting these titles into the library catalog, but until then, here are the direct links to the collection. Such gems as Lecture Notes in Mathematics, and the Biographical Encyclopedia of Astronomers are included.
This is the direct link to the Mathematics book subject collection http://www.springerlink.com/mathematics-and-statistics/?sortorder=asc&Content+Type=Books
and Astronomy: http://www.springerlink.com/books/?sortorder=asc&Subject=Physics+and+Astronomy