There is no required textbook for this course. All the material you need to know is found in the instructor's lecture notes posted on this website. But if you are looking for other sources for different perspectives, I can suggest the following texts:
Two fairly new texts you might try are:
Classical Electromagnetism in a Nutshell by A. Garg
Modern Electrodynamics, by A. Zangwill
Both these are available in ebook form for purchase or rental on Amazon.
Older classics are:
Classical Electrodynamics, 3rd edition by J.D. Jackson
Classical Electrodynamics, 2nd edition by J.D. Jackson
The Classical Electromagnetic Field by L. Eyges
Classical Electricity and Magnetism, 2nd edition by W.K.H. Panofsky and M. Phillips
Note that the 2nd edition of Jackson uses CGS units throughout, while the 3rd edition uses MKS units in the first half and CGS units in the second half. In this course we will use only CGS units.
The texts by Eyges and by Panofsky and Phillips are available as ebooks from the University Libraries. To access them you will need to login to the Libraries' website using your UR NetID. Then you will find the texts at these links: Eyges and Panofsky
Another good book, at the undergraduate level, is:
Introduction to Electrodynamics, by D.J. Griffiths
Library Resources - this link will take you to the University Libraries' page listing all the above texts.