There are many good books on the computers, however if you are a biggner then start to purchase introductory books on computer science of bacholors level, syllabus of any pakistani university merely having 7 to 9 books, i thougth you will be able to get across, however i use these three books for my study and having background of bacholor of computer science

1. Computer Science An overview by J.G. Brookshear
2. Introduction to Database Systems by C.J. Date
3. Computer Networks and Internet byD.E. Come

these are well written and good books accroding to CSS syllabus

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