BooksAstrophysics

# The Heart of the Matter

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Science  02 Jul 1999:
Vol. 285, Issue 5424, pp. 55-56
DOI: 10.1126/science.285.5424.55

## Summary

Active Galactic Nuclei From the Central Black Hole to the Galactic Environment. Julian H. Krolik. Princeton University Press, Princeton, NJ, 1999. 620 pp. $99.50, £60. ISBN 0-691-01152-4. Paper,$39.50, £23.95. ISBN 0-691-01151-6.

In this graduate-level text, Krolik offers a theorist's perspective on the high energy astrophysics of quasars, Seyfert galaxies, and other manifestations of active galactic nuclei.