This new edition will be excellent for students of philosophy seeking to draw out and defend their own philosophical reading and critique of Spinoza's radical Ethics. Domingo Aviles's updated and revised version of Elwes's historically influential translation is a wonderful contribution to contemporary understandings of the Ethics. Jason and Rebecca Waller's introduction helps ease readers into the history and intellectual climate of Spinoza's day, and their account of Spinoza's personal life and intellectual reception dramatically illustrate the radical nature of his philosophical method and views. I particularly enjoy the frequent grey-box notes the editors add throughout the translation. These provide readers new to philosophy or Spinoza with important and always helpful background information, context, and interpretive questions and cues. -- Christopher Martin, University of Toledo.