Just marathon'ed this book over a couple hours. This is an indispensable resource for anyone who either wants to learn Tok Pisin or learn about Tok Pisin. Mühlhäusler et al. have procured an excellent collection of texts (with great translations) that give the reader an excellent sense of how Tok Pisin has developed over the last 100+ years. This collection also gives you a better sense of Tok Pisin's inter-speaker variation than any textbook would give you (certainly a better sense than what I got from the grammar I read yesterday). Also, Mühlhäusler et al. provide critical historical commentary on the circumstances of Tok Pisin's development, including but not limited to its use in WWII propaganda, its speakers' metalinguistic awareness, its relationship to periodicals and the press, and much more. And above all, the book starts with a very clear and concise grammatical sketch of Tok Pisin.
Essential reading for anyone with any interest in Tok Pisin.