The legal and commercial importance of the tort of Conversion is difficult to overstate and yet there remains a sense that the principles of the tort are elusive. Most recently, this was illustrated by the difficulties posed for the UK's House of Lords by the Conversion issue in OBG v Allan [2007] UKHL 21, on which it was closely divided. Conversion, as now recognized, has a complex pedigree. Showing little regard for received taxonomies, it has elements which make lawyers think in terms of property, despite its eventful descent from actions in personam. Conversion is, therefore, something of a hybrid creature, which perhaps explains the paucity of scholarly analysis of the subject to date, with property lawyers and tort lawyers each regarding it as the other's concern. This book offers a coherent and accessible rationalization of the subject, supported by rigorous analysis of all aspects from title to sue to the available remedies. The principal thesis of the work is that the developm