Dennis (University of Cambridge, UK) Bray 
Cell Movements [PDF ebook] 
From Molecules to Motility

Cell Movements vividly describes how complex movements can arise from the properties and behaviors of biological molecules. This second edition is updated throughout with recent advances in the field and has a completely revised and redrawn artwork program. The text is suitable for advanced undergraduates as well as for professionals wishing for an overview of this field.