New Headway: Pre-Intermediate A2 - B1: Student's Book and iTutor Pack: The world's most trusted English course - Soars, John; Soars, Liz: 9780194769662 - AbeBooks
New English File Pre-intermediate: Student's Book Six-level general English course for adults (Paperback) by Oxenden, Clive; Latham-Koenig, Christina; Seligson, Paul: Muy Bueno / Very Good Paperback (2006) | V Books
Oxford English for Academic Purposes Pre-intermediate Student Book (B1) | 9780194002080, 9780194836111 | VitalSource
Solutions: Pre-Intermediate: Student's Book and Online Practice Pack: Varios: 9780194510707: Amazon.com: Books