As you want I am here suggesting you books for Institute of Banking Personnel Selection (IBPS) Bank PO and Specialist Officer examination.

Books :

Comprehensive Guide to IBPS-CWE Specialist IT Officer Scale I & II
by Disha Experts (Author)

Kiran's IBPS Specialist Officers I. T. Officer CWE SPL - 5 Professional Knowledge Practice Work Book
Kiran Prakashan


IBPS IT Officers Scale I & II (10 Practice Sets) Includes Solved Paper
GKP

IBPS-CWE Specialist Officer 101 Speed Tests - Agriculture/ Marketing/ IT
Disha Experts

IBPS-CWE Bank PO Guide
Disha Experts

IBPS-CWE Bank PO Guide
Arihant Experts