Yet another book topic. However, this one is mine!

Too bad you have no time. If you can budget moments for study; the Mammoth book of games is great fun and instructional.
Remember, most people can't play very well and you can have fun seducing people with your skills. Real players on the other hand, are just hard to beat.
Face it- you're going to lose games.

Oh and btw, I don't have "The mamoth book of the worlds greatest chess games", I have the "mamoth book of chess". Same author, two different books.
Yes.
http://www.amazon.com/Mammoth-Book-Chess-Graham-Burgess/dp/076243726X
http://www.amazon.com/Mammoth-Worlds-Greatest-Chess-Games/dp/0762439955


Since it seems you dont read much a good solution would be to work on the tactics trainer here or others that are online. The chess mentor program offered here is great too.
As for books you cannt go wrong with Winning Chess series by Yasser Seirawan is a great place to start. Read it until you have it memorized.
the classics are 'ok' but i would read collections of games like Alekhines best games helped me years ago add hundreds of points.