Two Japanese books, both with the author's signature. The back covers are slightly stained with pen marks. The contents are like new. - Title: Superb Conversational Skills - Title: Textbook of Communication - Author: Ken Watanabe - Language: Japanese - Signature: Signed by the author - ISBN: 978-4-7981-6042-0 - ISBN: 978-4-7981-6043-7 Thank you for looking.