where i can find any book or lecture to learn english

anyway I want to thank so mush you for your device and you Know its so hard to learn it without practice and without speaking directly with peaple ,so iam starting looking for any book or tiny book to freshen my memory becuse i fotget it and lost my passion after my join to the university,so if you can tell me about where i can have this lectures by useing the internet or by the librarey i will be very thankful,and thank at all.

Here's a good book in a pocket edition:
http://www.usingenglish.com/amazon/us/0194314162.html