I. Hilbert Modular Forms.- II. Dimension Formulae.- III. The Cohomology of the Hilbert Modular Group.- Appendices.- I. Algebraic Numbers.- II. Integration.- III. Alternating Differential Forms.
An excellent book on the theory of Hilbert modular forms. Very easy introduction to the theory with a nice appendix of basic algebraic number theory definitions. Highly recommended for those who want to learn about HMF.