C1 English Book

Future House Languages S.L

Activate Advanced C1: A Complete Self-Study Course (Activate Your English™)

Independently published

English C1 Advanced and C2 Proficiency Smart Vocabulary: Important Words and Phrasal Verbs to Write and Speak like a Well-Educated Native (Complete ... (The Most Comprehensive English Dictionaries)

Cambridge University Press

C1 Advanced 5 Student`s Book with Answers with Digital Pack (CAE Practice Tests)

Hueber

Destination C1 & C2: Grammar & Vocabulary / Student’s Book with Key (Destination – New Edition)

Independently published

C1 Advanced Use of English: 3 Books in 1: Open Cloze (Part 2), Word Formation (Part 3), and Key Word Transformations (Part 4) — 10+10+10 ... 50 fixed expressions, 50 phrasal verbs

30 English Short Stories C1 Level: Reading and vocabulary practice for advanced learners (English Edition)

Independently published

C1 ADVANCED Use of English (Open Cloze Part 2): 50 Practice Tests for the Cambridge exam

DMH Press

Idioms & Short Stories: The keys to natural English B1-C1 (Vocabulary Detective) (English Edition)

Zigzag English

40 ADVANCED BUSINESS ENGLISH DIALOGUES: Business English Conversation, English at Work - B2, C1

Bilingua Books

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