Tim Falla graduated from Oxford University with a BA Honours degree in Modern Languages. He took a Post Graduate Certificate in Education in English for Speakers of Other Languages at London University and taught in Japan, the UK, Spain, and Saudi Arabia. From 1988 until 1992 he was an editor in the ELT Division of Oxford University Press. Since then he has worked as a freelance author. Paul A. Davies began writing for Oxford University Press in 1998. Before that, he worked as an editor on several ELT coursebooks and as a compiler on an English-Spanish bilingual dictionary.