Here are three books I purchased today and why. The first is Managing IMAP.
I purchased the IMAP book because one of my large international clients is trying to move from a vertical email architecture to a more horizontal one. IMAP is very important for these thin-client architectures.
The second book purchased is now a classic, The Cathedral & The Bazaar.
Purchased this one because I love open source and have not read this great book (heard super, must read, things about this one.) Plus, I have to fly from VA to CA next week and need a good book for the plane.
The third book purchased today was, Vol II, Information Security Management Handbook, 4th Edition. I purchased this because I have a CA trip to a ecommerce dotcom next week providing guidance on their internet security architecture.
I purchased this book to give to the client if they need a reference. Plus, I know a few of the contributors and had worked with one of the guys for about a year. This is more for other peoples benefit, as required for my dotcom client work.
I promise to visit my bookshelf and post recommendations on my top 'must have' UNIX books and why (my perspective).