need some help in finding useful textbooks

[Shamy]

i was looking for some textbooks to improve my spoken english, by that i mean books usually used by foreign educational agencies..and it does not have to be very easy to read ,as long as it's helpful in my study.
i would appreciate it if anyone can give me some good recommendations.

[Morteza]

Hi,
I think "PASSAGES", in 2 volumes, is useful enough to improve your English practically.
Regards,
Morteza

[Morteza]

Hi,
I think "PASSAGES", in 2 volumes, is useful enough to improve your English practically.
Regards,
Morteza

[Shamy]

there are so many books called "PASSAGE"that i cannot find the one you mentioned above,,
it would be nice if you can give me the author's name,thank you...

[Morteza]

Hi,
"Passages" by Jack C. Richards & Chunk Sandy
Cambridge University Press
Regards,
Morteza