I just heard that my supervisor's book Chemometrics with R was released, and I immediately requested our library to get a copy. Ron introduced me to R at a time that most at our department were still using Matlab. In fact, I had be maintaining Matlab scripts used in the departments chemometrics courses, and wrote my own philogenetic tree visualization code for Matlab, using a I-no-longer-remember line notation system for the trees.

This book is recommended to all bioinformaticians too: many former colleagues from my old department are now in fact working in bioinformatics (see also this BioStar answer).