The Best of Warhammer RPGs Book Bundle for $18 gives you 7 or 8 products for each of three Cubicle 7 Warhammer RPGs. Each of these RPGs have been previously offered as separate bundles so those bundles are more complete for each RPG.

Instead I guess this bundle is for people who wanted to try all three RPGs (they're each quite different) although I think only the WFRP portion gives you enough adventures for a campaign.

I have bought the previous bundles and this one only has two new products for me, and at $40 retail the $18 would be a savings. But the two products are a starter set and a splatbook and therefore not interesting to me.

Warhammer Age of Sigmar: Soulbound (high fantasy, magitech, and post-apocalyptic horror)

CB72500 Warhammer Age of Sigmar: Soulbound core rulebook
CB725xx Warhammer Age of Sigmar: Soulbound Starter Set
CB72503 Warhammer Age of Sigmar: Soulbound Gamemaster's Screen
CB72509 Crash & Burn - PDF adventure
CB72518 Champions of Order - supplement
CB72520 Fateful Night - PDF adventure
CB72522 Trouble Brewing - PDF adventure
CB72530 Steam and Steel - equipment and equipment creation rules

Warhammer Fantasy Roleplay 4E (grim fantasy)

CB72400 Warhammer Fantasy Roleplay core rulebook
CB72401 Warhammer Fantasy Roleplay Starter Set
CB72403 Rough Nights & Hard Days - five interlinked adventures
CB72404 Warhammer Fantasy Roleplay Gamemaster Screen
CB72409 Buildings of the Reikland - PDF supplement
CB72443 One Shots of the Reikland - five adventures
CB72467 Up in Arms - Warriors splatbook (don't own, $20 PDF)

Warhammer 40,000: Wrath & Glory (far future dark fantasy)

CB72600 Wrath & Glory Core Rulebook
CB72602 Forsaken System Player's Guide - supplement
CB72604 Wrath and Glory Gamemaster’s Screen
CB72616 Redacted Records - supplement
CB72618 Wrath and Glory Starter Set (don't own, $20 PDF) - has one tutorial adventure
CB72628 Gutshiva's Kommandos - PDF supplement
CB72630 The Null Hypothesis - PDF adventure