David M. Williams & Malte C. Ebach 
Foundations of Systematics and Biogeography [PDF ebook] 

Introduction: Systematics, Evolution, and Classification.- Systematics as Problem-Solving.- The Archetype.- Ernst Haeckel and Systematische Phylogenie.- The German Development of Morphology: From Ernst Haeckel to Willi Hennig.- Pattern Cladistics.- Homologues and Homology.- Discovering Homologues.- Homology and Systematics.- Homology and Transformation.- Character Conflict.- The Analyses of Relationships.- Biogeographical Relationships, Evolution, and Classification.

David M. Williams is a diatom researcher and Head of Global Biodiversity Group in the Department of Botany, The Natural History Museum, London.He has published over 150 scientific papers, including 6 books. Among his books he is a co-author of the standard text Cladistics: The Theory and Practice of Parsimony Analysis (1992) and co-editor on Models in Phylogeny Reconstruction (1994) and Milestones in Systematics (2004). He is interested in the history and theory of systematics and biogeography and the systmatics of diatoms.
Malte C. Ebach is the WP5 Scientific Coordinator for the European Distributed Institute of Taxonomy at the Botanic Garden and Botanical Museum Berlin-Dahlem. His interests include the history and theory of comparative biology (systematics and biogeography), Goethe’s way of Science and when he has the time, trilobite taxonomy.