Principense is one of the four Gulf of Guinea Portuguese-based Creoles (GGPCs) - the other three being Sãotomense, Angolar, and Annobonese - a language family for which the lack of accurate, detailed descriptions is particularly striking. Prior to the publication of this book, Günther’s (1973) study – a serious but comparatively short work – was the main source of linguistic information on Principense. This book by Philip Maurer (M), which provides new, extensive documentation on Principense, is thus a most welcome publication, all the more so when one considers that the number of surviving native speakers of this endangered language certainly does not exceed 40, most of whom are already in their sixties.