Criminology by Larry Siegel
Juvenile Delinquency by Larry Siegel for Section 2: Juvenile Delinquency
Criminology A Sociological Introduction for some of the Contemporary issues in Criminology

The first book will cover 90% of your syllabus. The rest will be covered in the other two.
For the contemporary issues in Criminology, you can read articles related to cases in Pakistan. There is no real need of reading about them from a book, but it's your choice.