In 2010 Routledge published a second edition of Multilevel Analysis, Techniques and Applications. For more information see general Routledge site. The content and second chapter of the second edition can be previewed. As for the first edition, example data is available (as described in Appendix A of the book).

Hox, J.  (2010). Multilevel analysis: Techniques and applications. New York: Routledge.