Value at Risk:

The New Benchmark for Managing Financial Risk

by

Philippe Jorion

This book was rushed into print following the release of JPMorgan's landmark RiskMetrics description of VaR. Like RiskMetrics, its focus is on explaining VaR to corporate end users. For a while, it was the only book available on VaR, so it became well known. A second edition added material on topics other than VaR, but did not update the treatment of VaR. By today's standards, the book is dated.
Now there are a number of excellent books available on VaR, and these cater to various audiences. Depending upon what you are looking for, they offer a more accessible, more sophisticated, or more up-to-date treatment of VaR.
For an elementary introduction, you can't beat Butler. Downplaying theory, he shows you practical spreadsheet examples you can use to implement basic VaR models. He explains related topics, such as probability distributions, delta and gamma, and the Monte Carlo method, so the book is self-contained.
Marrison's "Measuring Market Risk" describes VaR in the context of bank risk management. More sophisticated than Butler, this is a practical, "real world" book for people starting in bank risk management. Marrison ties VaR together with topics such as capital allocation, credit risk modeling and asset-liability management.
Holton is written for practicing risk mangers or researchers. Before it even publishes, it has made a splash on trading floors where dog-eared preprint copies have become a coveted item. Holton explains in detail things like delta-gamma VaR and variance reduction for Monte Carlo VaR -- topics other books only mention. Also, Holton is the only book that offers exercises.
For use of VaR in investment management, see Pearson's "Risk Budgeting." It introduces VaR and then explains how it can be used to allocate assets between investment categories or among managers -- this is known as risk budgeting. The focus of the book is a technique from calculus that allows you to decompose risks so that the parts sum to the whole. There isn't much else written on this topic, and Pearson offers the best treatment that I know of.
Finally, there is Dowd's "Beyond Value-at-Risk." This provides an excellent survey of the literature on VaR. It also covers related risk management topics, including credit risk management and risk-adjusted performance measurement. (A reader)

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