It is good for the preaparation. SNAP syllabus is devided into the sections General Awareness, Analytical and Logical Reasoning, General English, Quantitative, Data Interpretation. The other books you can prefer-

Reading & Comprehension

This section requires you to be proficient at reading & comprehension, possess good verbal ability & skills for verbal reasoning.

Arun Sharma & Meenakshi Upadhyay's book you can prefer

RS Aggarwal's for Verbal & Non-Verbal Reasoning

Quantitative Aptitude:

Quantitative Aptitude by R.S. Aggarwal

MAP the SNAP by R.K. Jha

General Knowledge:

Lucent's General Knowledge

Good Luck!