A Grammar of Makary Kotoko by Sean Allison has been published by Brill in their series Grammars and Sketches of the World’s Languages, Africa, Volume: 12
The following description is found on the Brill website (Link)
In A Grammar of Makary Kotoko, Sean Allison provides a thorough description and analysis of Makary Kotoko – a Central Chadic language of Cameroon, framing the discussion within R.M.W. Dixon’s (2010a, 2010b, 2012) Basic Linguistic Theory. Working with an extensive corpus of recorded texts supplemented by interactions with native speakers of the language, the author provides the first full grammar of a Kotoko language. The detailed analysis of the phonology, morphology, syntax, and discourse features of Makary Kotoko is from a functional/typological perspective. Being based on a large number of oral texts, the analysis provides an example-rich description showing the range of variation of the constructions presented while giving insights into Kotoko culture.
The publication has more than 500 pages and is available in print and as E-Book (PDF).