One  book on GAMLSS is published and two others are  in preparation

•  `Flexible Regression and Smoothing:  Using  GAMLSS  in R’   was published in April 2017. See  here for an old draft version.
• `Distributions for Location Scale and Shape: Using  GAMLSS  in R’, is in preparation. See  here for the November 2017  draft version of the book.
•  `Generalised Additive Models for Location Scale and Shape: A Distributional Regression Approach’ is in preparation.  A draft version will be appear in the summer 2018.