Hello, here I am providing you the details of the books to refer for the IBPS RRB Specialist Officer exams as under:

IBPS CWE Specialist Officer (SPL) Exam books
IBPS – CWE Specialist Officer Recruitment Exam Success Master (English) 4th Edition (Paperback) by Experts Compilation Arihant
IBPS – CWE (4) Specialist Officer (Scale 1) Online Exam 2016: With Solved Paper (English) 5th Edition (Paperback) by Arihant Experts
Computer Science & Information Technology (Paperback) by Kiran Prakashan
IBPS – CWE Specialist Officer Bharti Pariksha Success Master 4th Edition (Paperback) by Experts Compilation Arihant
IBPS-CWE Specialist Officer Bharti Pariksha Success Master (H) by Arihant Expert

IBPS Specialist Officer Syllabus Books
Numerical Ability for IBPS & All Other Examinations (English) (Paperback) by UPSC Portal
State Bank of India & Associates Specialist Officer Recruitment Exam 2016: Success Master (English) 1st Edition (Paperback) by Arihant Experts
IBPS (CWE) Requirement of Specialist Officers 23 Practice Test Papers 1500+ Question in Professional Knowledge (English) 1st Edition (Paperback) by Unique Research Academy
English Language for IBPS & All Other Examinations (English) (Paperback) by UPSC
Reasoning for IBPS & All Other Examinations (English) (Paperback) by UPSC
Banking Awareness (Objective with Subjective) (The Complete book for IBPS, SBI and RBI Examinations (15 August 2014)) Paperback – 2016 by Sangram Keshari Rout and Soumya Ranjan Behera

IBPS Specialist Officer IT Books
IBPS – CWE SpecialistOfficer 101 Speed Tests – Agriculture Officer / Marketing Officer / IT Officer (English) 1st Edition (Paperback) by Disha Experts
IBPS – CWE (4) Specialist Officers Cadre IT Officer (Information Technology / Personnel Officer) Scale 1 Online Exam 2016: With 3 Self Enhancement Tests (English) 2nd Edition (Paperback) by Amar Jyoti Arihant
IBPS Specialist Officers CWE I.T. Officer Online Exam Practice Work Book (Paperback) Kiran Publication
IBPS Specialist Officer CWE SPL-IV common written examination I.T. OFFICER Practice Work Book(With CD) Paperback – 2013 by Kiran Prakashan
IBPS – CWE IT Officers Scale – 1 & 2 (With CD) : Common Written Examination 2014 (English) 4th Edition (Paperback) by GKP
Comprehensive Guide to IBPS – CWE: Specialist IT Officer – Scale 1 & 2 (English) 1st Edition (Paperback) by Disha Experts

IBPS Specialist Officer HR books
IBPS – CWE Specialist Officers Cadre IT Officer Scale 1 & 2 Recruitment Exam (English) 1st Edition (Paperback) by Amar Jyoti Arihant
IBPS – CWE (4) Specialist Officers Cadre HR Officer (Human Resource / Personnel Officer) Scale 1 Online Exam 2016 – With 3 Self Enhancement Tests (English) 2nd Edition (Paperback) by Arihant Experts

BPS Specialist Officer Agriculture field Officer (AFO) books
Bank Specialist Agricultural Field Officer Common Written Exam (Code 1783) (English) (Paperback) by Lal, Rajput Upkar Prakashan
IBPS – CWE Specialist Officer 101 Speed Tests – Agriculture Officer / Marketing Officer / IT Officer (English) 1st Edition (Paperback) by Disha Experts
Bank Agricultural Field Officer Common Written Exam (CWE) Guide (Popular Master Guide)2014 by RPH Editorial Board

IBPS Specialist Officer Law books
Kiran Publication Specialist Officer Books
RS Aggarwal books for IBPS Exam
Arihant books for IBPS Specialist Officer Exam