How many background books are there for Warhammer and 40k?

[dram]

Thanks for the replies, I've updated the list

For 40k there's:

13th Black Crusade
Tactica Imperialis
Xenology
The Fall of Medusa V
The Battle for Armageddon
Sabbat Worlds Crusade
Munitorum Manual
Imperial Infantryman's Uplifting Primer
Imperial Infantryman's Uplifting Primer, Damocles Gulf Edition
The Inquisition
The Inquisitor Sketchbook
The Horus Heresy: Collected Visions
The Warhammer 40,000 Quiz Book
Waaargh The Orks!
Codex Imperialis
Insignium Astartes
Inquis Exterminatus

For Warhammer there's:

Blood on the Reik
Darkness Rising
Liber Chaotica Complete
The Life of Sigmar
The Loathsome Ratmen
Empire at War
Liber necris
Grudgelore
The Witch Hunter's Handbook
The Warhammer Quiz Book
Uniforms & Heraldry Of The Empire
Uniforms & Heraldry of the Skaven
The World of Warhammer: The Official Encyclopedia

Am I missing any?

[Ex-guest]

Sabbat Worlds Crusade for 40 K

[Iron_Lord]

What about the Munitorum Manual and the Imperial Infantryman's Uplifting Primer?

[nagash66]

Liber necris and Empire at War are missing for fantasy too.

[woodster17]

The Bloody Handed God by Gav Thorpe.
Grudgelore.
Both for WFB obviously.

[DarkWarrior1981]

The Bloody Handed is a novella and tie in to the Time of Legends stuff by Gav, or do you mean another title by the same name?

In addition, there was also the Witch Hunters Handbook for WFB and The Inquisition for 40k. Furthermore of course the Horus Heresy titles (four books and one omnibus with some bonus content) and one Quiz Book each for W40k and WFB.

[BobtheInquisitor]

There's the old guide to WHFB: The World of Warhammer.

Do you count the Uniforms and Heraldry of the Empire?

[Dryaktylus]

WH40k

*Waaargh The Orks!
*Codex Imperialis
*Insignium Astartes