Best Books & Mock Tests for IB ACIO 2026

TestsYou recommends the EduJha IB ACIO mock test series as its top pick (featured partner) — full-length tests on the latest pattern, topic-wise practice sets and previous year papers with solutions. Aim for at least 15–20 full mocks before the exam and analyse every test.

The most recommended books for IB ACIO are: SSC Mathematics Chapterwise Solved Papers by Kiran Prakashan; Quantitative Aptitude for Competitive Examinations by R.S. Aggarwal; English for General Competitions (Plinth to Paramount) by Neetu Singh; A Modern Approach to Verbal & Non-Verbal Reasoning by R.S. Aggarwal. Start with the EduJha IB ACIO book set for syllabus-aligned practice, then use the standard books for depth. Read one good book per subject multiple times instead of many books once.

Intelligence Bureau Assistant Central Intelligence Officer Grade II (IB ACIO) is conducted by Ministry of Home Affairs (MHA). Recruitment of ACIO Grade II/Executive in the Intelligence Bureau.

Graduate; age 18–27. Always verify the latest criteria in the official notification at https://www.mha.gov.in.

IB ACIO is conducted in the following stage(s): Tier I (objective); Tier II (descriptive); Interview. Mode: Online (CBT).

The main subjects/sections of IB ACIO are: Current Affairs, General Studies, Quant, Reasoning, English, Essay. Download the detailed syllabus from https://www.mha.gov.in.

IB ACIO is held once a year. Dates are announced by Ministry of Home Affairs (MHA) in the official notification.

(1) Download the official syllabus and previous papers. (2) Build concepts from one standard book per subject. (3) Practise topic-wise sets daily. (4) Start full-length mock tests at least 3 months before the exam and analyse each one. (5) Revise weak areas and keep a short-notes register. (6) Take the last 15 days only for revision and mocks.