![](https://matthew.hall.org.nz/wp-content/uploads/2019/02/thesubtleknife.jpg)
By Phillip Pullman
341 pages
The Subtle Knife is the second book of the His Dark Materials Trilogy. Lyra has entered another world, blown open when Lord Asriel killed Roger, her goal is to find the source of an elementary particle known as Dust.
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