This monograph presents a corpus-based analysis of 240 English academic book reviews in the fields of linguistics and psychology. The primary goal was to identify and analyze the linguistic means of evaluation in order to compare these two related yet distinct fields of knowledge. The work is divided into two main parts: theoretical and empirical, with a total of nine chapters. The theoretical part explores the concepts of value and good from a philosophical perspective, the concepts of discourse and genre, as well as the language of opinion in academic discourse. The empirical part provides a multifaceted analysis of evaluative expressions in linguistics and psychology book reviews based on the author’s evaluation model. The findings demonstrate that praise and criticism take different forms and structures in linguistics and psychology book reviews. It is important to note that the evaluation parameters are also differently emphasized in the two corpora.