Paul Davies began working as an editor on several ELT coursebooks and as a compiler on an English-Spanish bilingual dictionary. He is co-author of the primary course and secondary courses All Stars and Oxford Spotlight. 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.