Warhammer Fantasy Role-Play: The Enemy Within & More Bundle is Cubicle 7's Warhammer FRP 4E. $26 for 18 items (plus a 20% off coupon). The Enemy Within is an epic campaign in five parts (each of two big adventures). The companions are new with supplementary material and adventures.

I own some of it from a previous bundle but only Enemy Within v1 so the rest is worth buying the bundle.

Warhammer FRP Core Rules (own)
Warhammer FRP Starter Set (own)

Enemy in Shadows (Enemy Within v1) - 160 pages (own)
Enemy in Shadows Companion - 120 pages
Death on the Reik (Enemy Within v2) - 160 pages
Death on the Reik Companion - 124 pages
Power Behind the Throne (Enemy Within v3) - 160 pages
Power Behind the Throne Companion - 128 pages
The Horned Rat (Enemy Within v4) - 160 pages
The Horned Rat Companion - 128 pages
The Empire in Ruins (Enemy Within v5) - 208 pages
The Empire in Ruins Companion - 120 pages

Altdorf: Crown of the Empire - 224 page guidebook
Middenheim: City of the White Wolf - 160 page sourcebook
Buildings of the Reikland - mini supplement (own)

Night of Blood - Old World adventure, 10 pages (own)
The Guilty Party - Ubersreik adventure, 24 pages, included in Ubersreik Adventures (2020) (own)
If Looks Could Kill - Ubersreik adventure, 28 pages, included in Ubersreik Adventures (2020) (own)