The Teacher's Book: Proficiency Use of English. New Proficiency Use of English by Fiona Scott-Barrett. Teacher's Book. Contents: Introduction, Diagnostic Test ( key), Key to Students' Book, University of Cambridge sample answer sheets. Useful for university students of English or those wishing to practise for their CPE exam.
Free e-book: Grammar in Context: Proficiency Level English (2nd Edition). Grammar in Context is a reference grammar and practical workbook combined. This edition retains the popular format of the original book, consolidating and extending the productive range of the advanced student. Students preparing for the Cambridge Certificate of Proficiency in English or equivalent examinations will find the book particularly relevant to their needs.
Ebooklink.net offers a free download of Upstream English Course - Proficiency /with Audio/. This series is specially designed for students from absolute beginner to intermediate level. Each book consists of five modules and provides systematic preparation in all four language skills - listening, speaking, reading and writing - required at these levels.