As you requires here I am suggesting you good books for Assistant recruitment Exam of Reserve Bank Of India (RBI).

Best Books for RBI Assistant Exam

Reserve Bank of India Assistant Recruitment Exam (Old Edition) Paperback – 30 Jul 2014
by Arihant Experts (Author)

RBI Reserve Bank of India Assistant Online Exam Practice Work Book: Including Solved Papers of
Kiran publication

Reserve Bank of India: Assistants Recruitment Exam Guide (Popular Master Guide)
RPH Editorial Board

Banking Awareness (Objective with Subjective - The Complete book for IBPS, SBI and RBI Examinations (15 August 2014) BK's Banking Awareness)
Sangram Keshari Rout

OBJECTIVE Computer Awareness
R. Pillai

Manorama Yearbook 2015 (Book & CD)
Mammen Mathew

Syllabus of the Exam –

1. General Awareness – Questions can be asked from Banking, Finance, Economy & Current Affairs news.

2. English Language – This section will consists of questions from different topics like –Reading Comprehension, Cloze Test, Spotting Error, Fill in the blanks, Parajumble & Sentence Improvement.

3. Quantitative Aptitude – This section will consists of questions from different topics like – Data Interpretation, Number Series, Approximation, Quadratic Equation & Miscellaneous Questions.

4. Reasoning – This section will consists of questions from different topics like – Syllogism, Inequality, Input Output, Coding & Decoding, Puzzles, Seating Arrangement, Data Sufficiency & Miscellaneous Questions