REFERENCE BOOKS FOR DT IDT

For DT - BB sir compact + compiler. 

For IDT - Amit Jain sir book is best. You will also get free video lectures with his book for 5 chapters and support for doubt clearance through whatsapp group and email.

Vineet Sodhani book is very unorganised. Its better to refer Amit Jain sir book. Its currently the best one for GST. Cherry on the cake is the book covers whole syllabus in 256 pages only (GST) and you get free video lectures for 5 chapters to help you start with your self-studies.