Cambridge Books
1.
IELTS Band 9
2.
Vocabulary advanced part II
3.
Academic writing handbook
4.
Advance Grammar Cambridge
5.
Top 20 Grammar for IELTS
6.
Speaking tips for IELTS
7.
Idioms Organizer
Reference Books
8.
Cambridge English Advanced
9.
Vocabulary advanced part II
10.
Academic writing handbook
11.
Advance Grammar Cambridge
12.
Top 20 Grammar for IELTS
13.
Speaking tips for IELTS
14.
Idioms Organizer