As you are doing Preparation of IBPS Specialist Officer exam and looking for its syllabus and good books, so here I am providing same :

IBPS specialist officer syllabus
English Language:
Reading comprehension, fill in the blanks, sentence corrections, Para jumbles, Vocabulary, Grammar Corrections, Identification of Errors, sentence corrections, Vocabulary, Grammar Corrections, Identification Of Errors, Synonyms/ Antonyms, Choosing the appropriate word and Spelling Check questions

Reasoning:
Questions are asked from both Verbal and Non Verbal reasoning. In verbal reasoning – Completing number and alphabetical series, Coding and decoding, relations and ranking, Simple arithmetical reasoning, Analogies / decision making, Classification, odd one out, time sequence test, analytical reasoning, directions/distance sense test, input /output /seating arrangements etc.
In non verbal reasoning – series completion, finding missing figures, Mirror Images etc.

QA Syllabus :
Number system, decimal fractions, Ratio and proportions, Percentage, Time and distance, Time and work, Speed and Distance, Profit and loss, Average, Simple and compound interest, Data Interpretation and sufficiency includes Data Tables, Charts and Graphs, and Probability

Professional Knowledge
IBPS Specialist officer examination is having 50 questions from the professional knowledge of the candidate based on the post they are applied for. Expect questions in graduation level, a good reference of text books in your degree class with some current affairs on the subject will make things easy. The following areas are considered important based on the previous year examinations.

IBPS IT officer syllabus for professional knowledge:
C Programming Basics, MS Office, Windows OS and Programming, DBMS, Data Communication & Networking , Network Security, Web Technologies, Basic Programming concepts, Basics of hardware (Microprocessor, timer, ALU etc. ),

Software Engineering.

—->Data Base Management System (DBMS) – 15-20 Questions
1. RDBMS
2. Normalization
3. Overview of SQL queries
4. E- R Diagrams
5. Transaction Management
—–> Data Communication & Networking – 10-15 Questions
1. Network Architecture
2. OSI Model
3. TCP-IP Model
4. Data Communication
5. IP Addressing (Subnetting)
—–> Operating System – 4-5 Questions
1. Process
2. Thread
3. Types of OS
4. Semaphore
5. Scheduling
6. Dead Lock
7. Memory Partitioning
8. Page Replacement
—–> Computer organization + Hardware (Microprocessor ) – 4-5 Questions
1. Bus Structure
—–> Network Security – 2 – 3 Questions
1. Cyber Crimes
2. Risk Management
3. Firewall
4. Cryptography
—–> Software Engineering – 2 – 3 Questions
1. Software Development life cycle (SDLC)
2. Software Development Models
—–> Data Structures – 3 – 4 Questions
1. Array
2. Linked List
3. Stacks
—-> Web Technologies – 1-2 Questions
1. HTML Tags
2. XML
3. Network Security
—–> Programming Languages (BASIC) – 1-2 Questions
1. C, C++
2. OOP (Objected oriented Programming)

IBPS Law officer syllabus for professional Knowledge:
Law and Acts with direct and Indirect Implication on the banking sector like Contract Acts, Partnerships, Companies, Firm, RBI Constitution, RBI Acts, Important laws and rulings related to negotiable instruments, securities, Foreign Exchange, Prevention of money laundering, Limitation Act, Bankers Book Evidence Act, DRT Act, Offences and Penalties, SARFAESI, Consumer Protection Act, Banking Ombudsman Scheme, RTI Act, Information Technology Act. The above sections need detailed study.