C1 English Grammar

Cambridge English

Grammar and Vocabulary for Advanced Book with Answers and Audio [Lingua inglese]: Self-Study Grammar Reference and Practice

Future House Languages S.L

Activate Advanced C1: A Complete Self-Study Course

English Language Academy

English Grammar: Suitable for levels A1-C1 - Includes exercises with key (English Edition)

Bonacci

Gramm.it for english-speakers. Livello A1-C1    

Collins

Collins Work On Your Grammar C1                  

English Language Academy

English Grammar Practice : 100 C1 Phrasal Verbs and Expressions (English Edition)

Next Level English C1 Advanced: 50 lessons to improve your English conversation: Real-world vocabulary and grammar for speaking success (English Edition)

PODIPRINT

Reading CAE: Eight practice tests for the Cambridge C1 Advanced

Cambridge University Press

English Grammar in Use Book with Answers and Interactive eBook: A Self-study Reference and Practice Book for Intermediate Learners of English [Lingua inglese]

Hoepli

Active English grammar. A practical guide for Italian learners [Lingua inglese]