Two SPI3 reference books set! Both books were purchased at a bookstore in September-October and used for exam preparation! Therefore, there are some writings and folds in various places! How about using them as a reference until the exam? Recommended for those who want to solve many problems! I am selling them as the exam is over m(_ _)m Practical problem set, perfect for SPI preparation, with answer sheets. - Title: SPI3 Test Center 2027 Edition - Publisher: TAC - Target: SPI Preparation - Features: Practical problem set - Included: With answer sheets Thank you for viewing.