Pendragon 4th ed supplement set in Scandinavia/Thule that is extremely hard to find nowadays (trust me, I've tried without any luck to find a printed version!). This is a great source for 4th or 5th ed Pendragon that you can use for a foreign setting in your Grail quest.

Highly useful sections on sea travelling, geography, climate, politics, society and player character creation for this particular area. Useful, specific characters, like Beowulf and interesting, indigneous creatures

Some good scenarios, including an atmospheric one where you can battle Grendel himself!

Good moody line drawings. Crisp, clear scans. Highly recommended.