Really enjoyable, though Corvax acts too naive relative to his ostensible intelligence. The Alpha Legion appears unstoppable.

**********POSSIBLE SPOILERS, YOU'VE BEEN WARNED********** For how awesome the source material for the Raven Guard is, this book really got away from the author into left field. Anyone who's even slightly familiar with 40k knows there's precisely zero chance the Corax will not develop super soldiers that turn the tide of the Heresy, which pretty much ruins all the tension in the main plot. Beyond that disappointment, however, is the sheer dull-mindedness displayed by Corax and his Raven Guard. The ease with which they are fooled (I won't ruin the specifics), is downright ridiculous and makes what should have been a goddamn awesome read a boring slog. Overall a bummer of a book following the letdown that was Outcast Dead. At least They Shall Know No Fear turned out to be awesome, you can always count on Abnett!

The Horus Heresy series continues in one of the best in the series.