While you can find various summaries and academic discussions of Edmund Bacon’s seminal work online, his book is a copyrighted architectural staple. If you are looking for a "free download," it is worth noting that official digital copies are usually hosted through university libraries or paid platforms like Internet Archive’s "Lending Library."
A large portion of Design of Cities is dedicated to analyzing why ancient and Renaissance cities worked so well. Bacon looks at: The organic growth of the Agora. design of cities edmund bacon free download
Many architecture students have access to PDF versions through JSTOR or their school’s digital library. While you can find various summaries and academic