This is great - I've been looking for a good series to have on hand when I want to dive deeper into a math field on an as-needed basis. For example, the Linear Algebra one could be really useful if I decide to get deeper into any Machine Learning stuff - http://link.springer.com/book/10.1007/978-1-4612-1670-4

It's possible to do things with statistics/ML even without having the greatest grasp on linear algebra, but it sure would help to have a firmer foundation. Thanks!