In your opinion, what is the best book/site to learn Python with GIS goals in mind? By "best", I mean: not very long (book) easy to understand (book/site) good practical examples (book/site)
What books, journals, electronic resources are most valuable for expanding Geographic Information knowledge?
What books, journals, electronic resources have you found most valuable for expanding your knowledge in the GI field? To which of them you come back most often? One item per post please.