What are the best books or (survey) articles ib the topology and geometry of Grassmannians $G_k(\mathbb{R}^n)$ or $G_k(\mathbb{C}^n)$. I am interested in:

- Is there a topological classification possible, using the extra structure of "being a Grassmannian" ?
- Is there a differential toppological classfificuation ? (for example: are there any exotic or fake Grassmannians) ?

This is the same question as http://math.stackexchange.com/questions/59414/books-on-topology-and-geometry-of-grassmannians. I have altered things a bit, since the stackexchange question is nuch to wide to ask here, I think.