Peter Trudgill and Laurie Bauer are both respected linguists. Trudgill has written many books for Penguin (including Sociolinguistics which has sold 130,000 copies since it was first published in 1974). Other contributors include Jean Aitchison (Professor of Language at Oxford), Lars Gunnar-Andersson (co-author of Bad Language with Trudgill) and Janet Holmes (Women, Men and Politeness, 1995, Longman). Peter Trudgill lives in Lausanne (and sometimes Norwich.) Laurie Bauer lives in New Zealand.