Computational Methods in Molecular Biology - Edited by S. Salzberg, D. Searls, and S. Kasif. Elsevier Science, 1998. The book is largely devoted to machine learning approaches to molecular biology. The site includes an online appendix. - http://www.cs.jhu.edu/~salzberg/compbio-book.html
Machine Learning textbook - A textbook by Tom Mitchell, McGraw Hill, 1997. - http://www.cs.cmu.edu/~tom/mlbook.html
Machine Learning, Neural and Statistical Classification - This book is based on the EC (ESPRIT) project StatLog which compare and evaluated a range of classification techniques, with an assessment of their merits, disadvantages and range of application. This integrated volume provides a concise introduction to - http://www.amsta.leeds.ac.uk/~charles/statlog/