We have every full-text online book from Springer from 2005 to date. This includes book series, encyclopedias, etc., on every subject discipline, not just earth sciences. Springer is a major publisher in all STM (science/technology/medicine).
We intend to continue this e-book purchasing with Springer's catalog each year. After all, why purchase 1/3 of their catalog in print format, when you can get their entire output electronically for about the same price?
So if you are looking for a book and you think it was published by Springer since 2005, then this is where you will find it.
You can print out any page, a chapter, or the whole book. Or purchase your own personal copy from the specific book's webpage, for $25.