Hii,i am here to help you according to your query.FYI, School of Open Learning is also a part of University of Delhi and many of the students (who doesn't get admission in regular, they decide to chose SOL), pursure their graduation or post-graduation from SOL.

Talking about the books, you can either go to SOL office for the information related to the Books and contents or you can just buy it from the other book store or preferred book/photocopy shops by your teachers.

Btw, SOL, hardly provides its contents.

All the best