Max Weber is a well-known sociologist and a key figure at Sciences Po.
The theme chosen for the Sciences Po is the city, and it is a good thing that Max Weber has devoted an entire book to the city!
You will find more information about this work on this page:
http://www.franceculture.fr/oeuvre-la-ville-de-max-weber-traduit-de-lallemand-par-philippe-fritsch.html
Max Weber studies “a whole range of ideal-typical cities”, and his work is all the more relevant as he relates them to democracy, politics, society, exactly what you are asked to do for the Sciences Po exam.
A course on the city according to Max Weber’s theses is also available here: http://nb.zeserveur.net/hopfichiers/Seance3_cours.pdf.
Finally, you can buy the book online or in bookstores, even if it is quite thick.
→ On the theme of the city, check out this best-of “City” articles as well.