Reading Recommendations?

Hello! I have been engrossed in Warhammer for a couple of years now, and am consuming it's novels and lore at a prodigious rate.

Currently, I have read the entire Horus Heresy series, including the siege of terra and TEATD, the Rise of the Beast series, as well as the Eisenhorn and Ravenor books.

I like being able to finish a book and just reading the next in the series, so long series such as the ones I've already read are my favorites.

Are there any other longer series covering 30k lore?

What are some good points for reading some of the newer books/series?

Any personal favorites I absolutely have to check out?