Best Books for Quant Interviews
The essential reading list every quant candidate should know — honest reviews, who each book is for, and the honest truth about where books stop and practice begins.
Which Book Should You Start With?
If you are new to quant interview prep, the answer is almost always the same: start with the Green Book (Xinfeng Zhou). Work through the probability chapter until you can solve every problem without hints. Then move to brain teasers. Then come back to stats and stochastic calculus based on the role you are targeting.
The Green Book is the closest thing quant prep has to a canonical curriculum. Every other book on this list is a supplement, not a replacement.
The Books
The single most-referenced book in quant interview prep. Zhou covers probability, statistics, brain teasers, linear algebra, stochastic calculus, and finance in a structured progression. Problems are directly representative of what Jane Street and Citadel actually ask — particularly the probability and expected-value sections. Every serious candidate should work through it cover to cover at least once.
The original quant interview prep book, first published in 1994 and continuously updated. Crack's strength is in brain teasers and lateral thinking problems that mirror real interview questions. The finance sections are more traditional (DCF, options pricing basics), but the logic puzzle content is excellent and not fully covered elsewhere. Works best as a complement to the Green Book rather than a replacement.
Joshi's book targets candidates interviewing for derivatives-focused quant researcher and quant developer roles. It goes deeper on Ito's lemma, Black-Scholes derivation, Monte Carlo methods, and numerical techniques than anything else on this list. If you are interviewing at Two Sigma for a research role or at a sell-side bank for a derivatives quant position, this is essential. Less critical for pure trading roles that emphasize probability over stochastic calculus.
A short, dense collection of 50 carefully chosen probability problems with detailed solutions. Mosteller's explanations build genuine probabilistic intuition — not just formula application. Several problems in this book appear in thinly veiled form in real quant interviews. It is inexpensive, fast to read, and the problems are genuinely hard enough to be worth solving. Excellent for sharpening your approach before drilling the Green Book.
Covers logic puzzles and lateral thinking problems common in quant phone screens and early-round filters. Less rigorous than Mosteller or the Green Book, but useful for familiarizing yourself with the format and style of brain teaser questions before encountering them under pressure. Good for candidates at the very start of their prep or those who want low-intensity warmup material.
The Green Book vs. AI Practice: What Actually Prepares You
The Green Book is the best starting point in quant prep — but it has a structural limitation that no book can solve: quant interviews are verbal and adversarial. Reading a solution teaches you the answer. It does not teach you to produce the answer out loud, under pressure, while an interviewer probes for weaknesses in your reasoning.
- ✓Comprehensive problem coverage across topics
- ✓Works through underlying theory, not just answers
- ×Static — same problems every candidate reads
- ×No time pressure or follow-up questions
- ×You can re-read solutions without truly solving
- ×Does not simulate the verbal, adversarial format
- ✓Real questions from Jane Street, Citadel, Optiver
- ✓Explains where your reasoning went wrong
- ✓New problems — not questions you have already read
- ✓Timed, pressured, verbal format
- ✓Follow-up questions like a real interviewer
- ✓Simulates exactly what the interview feels like
The best prep combines both. Read the Green Book to build your mental framework. Use it to understand why certain probability arguments work. Then switch to deliberate practice — solving problems you have not seen before, out loud, with feedback. The ratio should shift over time: early on, 70% reading / 30% practice; in the final two weeks before interviews, 20% reading / 80% active practice.
Books give you the theory. We give you the practice.
1200+ real questions from Jane Street, Citadel, and Optiver — with an AI interviewer that pushes back on your reasoning the way a real interviewer does.