DUO 3.0 is perfect for efficient English vocabulary learning, containing 560 example sentences. While in good condition, there are some markings on the vocabulary book from a Frixion pen, as shown in the third photo. - Product Name: DUO 3.0 - Contents: 560 English words and example sentences - Printed in: Japan - Features: Efficient and reliable - Target Audience: Ideal for TOEIC and TOEFL preparation Thank you for looking.