• English vocabulary in use pre – intermediate and intermediate 

      Redman, Stuart (Cambridge University Press, 1997)
      The second in the family of best-selling vocabulary reference and practice books from elementary to advanced level. This second edition has been fully revised to ensure that the vocabulary presented is current and relevant.
    • Intermediate English Grammar 

      Murphy, Raymond (Cambridge University press, 1994)
      This book for intermediate & more advanced students combines reference grammar & practice exercises in a single volume. Key section contains answers to all the exercises.