Let me begin with, mylist of top 5 books: Others are welcome to
agree/disagree add/delete to the list.

1. Digital signal processing : principles algorithms and applications
proakis and manolakis

2. DSP a practical approach : Ifeachor Jervis

3. DSP using matlab : Ingle and Proakis

4. Discrete time signal processing : oppenheim, schafer and buck.

5. Understanding DSP : Richard Lyons.

The above sequence is not in any preferrential order.

Bharat Pathak