The best book for UPSC optional Political Science (PSIR) Paper 1 is O.P. Gauba’s An Introduction to Political Theory (8th edition, Mayur Paperbacks); for Paper 2 it is Andrew Heywood’s Global Politics (3rd edition, Bloomsbury, 2023). Together they cover roughly 60% of the PSIR syllabus and appear in the booklists of both Ishita Kishore (AIR 1, CSE 2022) and Shakti Dubey (AIR 1, CSE 2024) — both PSIR optional candidates. Below: the full paper-wise list with latest editions and prices, the famous titles to skip, and what the complete kit costs.
If you want consolidated coverage instead of 10+ standard books, the Shubhra Ranjan PSIR Notes 2026 (set of 4 booklets, English medium) compress Paper 1 and Paper 2 into exam-ready answer points — the single most-cited study material among recent PSIR rank holders.
The Core PSIR Booklist: 8 Must-Buy Books, Paper-Wise
Most booklists dump 15–20 titles with no priority order. You need eight. Start with the four Class XI–XII NCERTs (Political Theory, Indian Constitution at Work, Contemporary World Politics, Politics in India Since Independence — ₹65–100 each), then these five core books mapped to the four syllabus sections:
| Book | Author | Syllabus section covered | Latest edition | Approx. price |
|---|---|---|---|---|
| An Introduction to Political Theory | O.P. Gauba | Paper 1A — Political Theory (justice, rights, democracy, ideologies) | 8th, Mayur Paperbacks | ₹550–650 |
| A History of Political Thought: Plato to Marx | Mukherjee & Ramaswamy | Paper 1A — Western thinkers (10 of 13 listed thinkers) | 2nd, PHI Learning | ₹400–500 |
| Introduction to the Constitution of India | D.D. Basu | Paper 1B — Indian Government & Politics | 27th, LexisNexis | ₹750–900 |
| Global Politics | Andrew Heywood | Paper 2A — Comparative Politics & IR theory | 3rd, Bloomsbury (2023) | ₹800–950 |
| International Relations | Pavneet Singh | Paper 2B — India and the World | 4th, McGraw Hill | ₹650–750 |
Add three secondary books only after a first reading: Bidyut Chakrabarty’s Modern Indian Political Thought for the Indian thinkers of Paper 1A (Gandhi, Ambedkar and M.N. Roy are asked for 15–20 marks every year), B.L. Fadia’s Indian Government and Politics for the dynamic 1B topics (party system, caste politics) that Basu’s constitutional text doesn’t touch, and Rajni Kothari’s Politics in India for quotable scholarship. Two famous titles are now dated and not worth full price: V.P. Dutt’s India’s Foreign Policy stops before the current multipolarity debates, and Rajiv Sikri’s Challenge and Strategy (2009) predates the Quad, AUKUS and the post-Galwan China reset. Replace both with Pavneet Singh’s current edition plus a monthly IR digest such as the Vision IAS Current Affairs Magazine (January 2026, English) — Paper 2B questions from 2023–25 have come almost entirely from events of the preceding 18 months.
Gauba vs Heywood, Khanna vs Pavneet Singh: Which Should You Buy?
Gauba vs Heywood for political theory: Heywood’s Political Theory is better written, but Gauba’s chapters track the 1A syllabus headings almost line by line, so Gauba wins for Paper 1A. Do not buy Gauba if you already hold a BA/MA in Political Science — go straight to Mukherjee & Ramaswamy plus the 2019–2025 previous-year questions. For Paper 2, the reverse holds: Heywood’s Global Politics is non-negotiable because the 2A theory questions (realism vs constructivism, feminist IR, hegemonic stability) use his vocabulary.
V.N. Khanna vs Pavneet Singh for IR: Khanna is stronger on Cold War history; Pavneet Singh is updated, exam-oriented and includes India-specific chapters mapped to 2B. Buy Pavneet Singh; borrow Khanna from a library only if your Cold War basics are weak. You do not need both — that’s ₹700 better spent on a current-affairs subscription, which is where Paper 2 marks actually come from.
Standard books vs coaching notes: Books give depth and scholar citations; notes give pre-digested answer frameworks. English-medium aspirants without coaching should pair the five core books with the Shubhra Ranjan PSIR booklet set. Hindi-medium aspirants should skip Shubhra Ranjan entirely (English only) and take the Rajesh Mishra PSIR Notes 2025-26 (6-booklet set, Hindi medium) with the Hindi NCERTs, plus the Vision IAS Current Affairs Magazine in Hindi for Paper 2 — no top-ranking booklist page even mentions a Hindi route.
What the Full Kit Costs — Budget vs Comprehensive
Budget kit (~₹3,800–4,500): 4 NCERTs + the 5 core books above. This alone covers every static topic asked in PSIR 2024 and 2025 — the 2024 Paper 1 questions on Gramsci’s hegemony and multiculturalism come straight from Gauba, and the Paper 2 question on the realist paradigm is a direct Heywood chapter.
Comprehensive kit (~₹7,000–8,500): budget kit + Chakrabarty + Fadia + Kothari + a notes set. PSIR gives the highest GS payback of any optional — Paper 1B overlaps with GS2 polity and Paper 2 with GS2 IR — so the Vision IAS GS 2026-27 set (56 booklets with value-added material) covers the GS side and lets your PSIR reading do double duty.
FAQs
Which book is best for political science optional in UPSC?
No single book covers all four PSIR sections, but the highest-yield single purchase is O.P. Gauba’s An Introduction to Political Theory — Paper 1A carries 250 marks and Gauba covers nearly all of it. The minimum complete set is five books: Gauba, Mukherjee & Ramaswamy, D.D. Basu (27th edition), Heywood’s Global Politics (3rd edition) and Pavneet Singh — roughly ₹3,200–3,750 in total.
Is Andrew Heywood enough for the PSIR optional?
No. Heywood covers Paper 2A (comparative politics and IR theory) but nothing of Paper 2B’s India-centric topics — India–China, India–US, neighbourhood policy, UNSC reform — which contributed over 200 of Paper 2’s 250 marks in 2024 and 2025. Pair Heywood with Pavneet Singh’s International Relations and a monthly current-affairs magazine; Heywood has zero relevance to Paper 1.
Is 6 months enough to complete the PSIR optional syllabus?
Yes, with the prioritised 8-book list above: 6–8 weeks for Paper 1A (Gauba + thinkers), 4 weeks for 1B (Basu + Fadia selectively), 6 weeks for Paper 2 (Heywood + Pavneet Singh), leaving 8–10 weeks for PYQs and answer writing at 2 daily answers. The 20-book lists on most websites are what make 6 months feel impossible — Shakti Dubey (AIR 1, CSE 2024) scored among the top PSIR marks with essentially this core list plus class notes.
