Swot up on your Warhammer 40,000 Horus Heresy lore in the latest Humble Book Bundle

You might know your Warhammer 40,000 lore, but you haven’t really delved into the bloody and brutal sci-fi universe until you’ve read the expansive series of Horus Heresy books that plot out the 31st-millenium major conflict.

Luckily for you, there’s now a quick way of catching up with some of the expansive storyline (41 books and counting as of the end of last year) which began more than a decade ago with the Horus Rising/False Gods/Galaxy in Flames trilogy.

Humble Bundle’s latest books bundle is focused entirely on the Horus Heresy, offering up dozens of the generally well-regarded novels, audiobooks and comics set around the war.

The site claims the books are worth $376 (about £300) separately, but can be picked up en masse in a digital form for as little as 80p for the first five books in the set, plus the audiobook Garro: Oath of Moment and Prospero expansion for the PC version of Games Workshop’s Horus Heresey-themed Talisman spin-off.

Up your ‘pay what you want’ price to £6.40 and you’ll add the next five books, plus the audiobook Garro: Sword of Truth, a Horus Heresey wallpaper collection and #0 in the Warhammer 40,000 comic series Will of Iron.

Finally, for £12 or more you’ll get the whole set, including the first 15 books in the series, audiobook Garro: Legion of One, the first Horus Heresy graphic novel Macragge’s Honour, digital Warhammer 40,000 art book The Emperor’s Will, Will of Iron #1 and a couple of discount coupons for The Battle of Tallarn and Battlefleet: Gothic Armada.

All of the books and comics are digital (obviously) and free of DRM and, like all of Humble’s sales, some of the money will go to charity – either one of your choice or the US refugee organisation UNHCR.

If it seems like a fair deal to you, you've got just over another nine days before the sale ends on April 12th.