The list of books which one can refer to for the recruitment examination which are conducted by ONGC are as follows:

Prep Book for ONGC Exam (General Awareness):

General Knowledge 2013: Essential 'Knowledge Capsule' in General Awareness & Current Affairs by Manohar Pandey; Publisher: Arihant
Price: Rs. 25/=

General Knowledge Manual 2012 by Muktikanta Mohanty; Publisher: Macmillan
List Price: Rs. 175

General Knowledge Manual 2012 by Barry O'Brien; Publisher: Cengage
List Price: Rs. 525

Prep Book for ONGC Exam (General Aptitude):

General Aptitude: (Quantitative Aptitude & Reasoning) For Competitive Examinations by G.K. Publisher
List Price: Rs. 295

Quantitative Aptitude For Competitive Examinations by R. S. Aggarwal Publisher: S.Chand
List Price: Rs. 440

A Modern Approach To Verbal & Non-Verbal Reasoning by R. S. Aggarwal Publisher: S.Chand
List Price: Rs. 695

Objective English For Competitive Examinations by Hari Prasad, Uma Sinha; Publisher:TMH
List Price: Rs. 365

Prep Book for ONGC Exam:

Trends In Objective Geology by Ausaf Sayeed Publisher: CBS
List Price: Rs. 300

NTPC/NHPC/IOC/HP: Mechanical Engg. Guide by Gupta; Publisher: RPH
List Price: Rs. 465

NTPC/NHPC/IOC/HP: Electronics Engineering Guide by Gupta; Publisher: RPH
List Price: Rs. 445

NTPC/NHPC/IOC/HP: Electrical Engineering Guide by Gupta; Publisher: RPH
List Price: Rs. 495

NTPC/NHPC/IOC/HP: Civil Engineering Guide by Gupta; Publisher: RPH
List Price: Rs. 535

NTPC Finance Executive Trainees Recruitment Exam By GK Publications
List Price: Rs. 450

Instrumentation Engineering for GATE: A Refresher by The Gate Academy Publisher:Cengage
List Price: Rs. 225

GATE 2013: Chemical Engineering By GK Publications
List Price: Rs. 695;

Fundamentals Of Petroleum And Petrochemical Engineering by Ulag Mahadevan; Publisher: SBS
List Price: Rs. 1295