He has written many different coursebooks, his latest two being Smart Choice (Oxford University Press) and Just Right Advanced (with Jeremy Harmer, Carol Lethaby and Ana Acevedo): Marshall Cavendish (now part of Cengage). In 2008, OUP also published Drama and Improvisation, a compilation of about 75 of his drama activities. Ken is a frequent keynote speaker at ELT conferences and usually gives workshops on using music and drama.