Inside Out IV. Special Edition.  Student's book   +  Workbook with key. (Heinemann)
 
 

 Practical English Usage (New Edition), M.Swan.O.U.P.
 Advanced Grammar in Use (with key), Martin Hewings. C.U.P.
 How English Works. O.U.P.
 First Certificate Language Practice, Michael Vince. Heinemann.

A good monolingual dictionary:

Cambridge International Dictionary of English
Collins Cobuild English Dictionary
Oxford Advanced Learner’s Dictionary
Longman Dictionary of Contemporary English

A good bilingual dictionary:  Oxford / Collins / Longman