It looks like Forge World are undertaking various changes in the bundles that they offer. This might be related to the rumour that Games Workshop are redoing their whole website and incorporating Black Library, Forge World and GW into one store (at the same time Forge World take over Finecast production), or it could be they just fancied a change 🙂
Of interest they now offer both of the Forge World Masterclass books for the price of £50. Both of these books are really good resources if you want to produce realistic vehicles or terrain and probably one resource that I’ve used the most of out all of the books and websites I’ve used.