Hii there,

Subsidiary books are of many types, like Cash Book, Purchases Book, Sales Book, Journal paper, etc. There are many publications which you can refer to, but it's quite difficult for us to refer any side book. It depends on the college you go to, the study pattern and many other factors. I would suggest to consult your subject teachers, your seniors might help you more significantly. I hope you got it.

All the best!!