Hello Everyone iv'e been a Mathematica user for four months and i'm still excited about it since iv'e found out about it ... i used it for running a CNC Router,creating visual arts,neural networking and many more .. back to the point i feel my learning process is slowing down lately because Documentation center provides very basic information about Mathematica with short lines of code .. and i can find very little instructions about running bigger codes and more complex problems, i need your help to show me sources (if there is any) that provide more advanced information about mathematica's features any good reads or videos will help and will appreciate it and also does anyone know a source where i can get the 4 Volumes of The Mathematica Guidebook online? .... i'm from middle east so i might not have access to good english libraries , but it would be great to suggest good books that i can get online