Thank you fellows for all the info & advice! They are very helpful.
I learned chess two decades ago but decided recently to study it methodically, so although I consider myself still a beginner I have no problem with understanding any chess book from whatever level (after all it's chess not quantum mechanics).
I have a problem with money because our government has done some recent economic "reforms" which resulted in the Egyptian pound being equal to 1/20 of the US dollar, which means that in order to get a chess book whose cost is 50 dollars I need to pay 1000 pounds (catastrophic!)
I'm accustomed to the Arabic descriptive notation (similar to the English one with the difference of letters) but I prefer the algebaric notation because it is easier to follow and more fun (most of all the figurine algebraic).
I have no certain opening which I want to learn heavily, I just want to be able to understand the ideas behind all openings and be able to deal with whatever opening on board.
I understand that openings are constantly changing which favours the newest books, but it doesn't always have to be due to the improvement of the new openings, sometimes it changes simply due to the taste of the top elite GMs, sometimes there's nothing objectively wrong with an old opening (or variation) nor anything objectively better with a new one. So old books still have their ideas which one can learn from (feel free to correct my ideas if they are wrong).
The Quality Chess openings collection seem quite interesting but quite expensive too, so I guess I might go to the ECO (probably starting with the small one) or just save my money for now until some new encyclopedia appears :D
Thank you all again.
About five hours ago, RussBell came up with the title, Catastrophes & Tactics in the Chess Opening. If that is what you were writing about, I do not see a need for any more from you.
i'm glad to be relieved from the duty of spoonfeeding you...