Work your way through the levels of difficulty and prove yourself worthy of Valhalla with this excellent collection of sudoku puzzles.

Dotted throughout you will find quotes from Norse mythology and pages decorated with runes. All inside a beautifully designed cover, this is sure to delight any puzzles or Nordic fan. Can you solve them all?

• EXERCISE YOUR BRAIN: Give your mind a great workout as you pit your wits against these number-placement teasers.
• REDUCE STRESS: Feel your stress melt away as you focus on these satisfying puzzles.