hi,

the questions structure for icici po is same type as ibps po or sbi po exam. so if you have given any of those exam you have a plus point. question type is like cat standards and have verbal and logical reasoning, quantitative aptitude, numerical questions, data interpretation, english grammar  etc.

some books you may find helpful:

Quicker mathematics by M.tyra

Quantitative Aptitude by Dr. R.S. Aggarwal

A Modern Approach to Verbal & non- Verbal Reasoning by R.S. Aggarwal

Analytical Reasoning by A.K.Pandey

data interpretation by Arun Sharma