Katherine Davidsen is a language teacher who has lived and taught in Indonesia for over 15 years. She has a degree in Indonesian Language and Literature from Monash University in Melbourne, Australia. She is the author of Easy Indonesian and several dictionaries including Tuttle Concise Indonesian Dictionary, Periplus Pocket Indonesian Dictionary and has written a number of other books on Indonesian, as well as a Sundanese dictionary.

Yusep Cuandani is an Indonesian teacher who has spent his career teaching Indonesian language to native and non-native students for more than 15 years in the IB and IGCSE curriculums. He has mostly taught in international schools in Bandung and Jakarta.