New Thing: Challenge # 27

Challenge 27 - complete a whole sudoku book (2 week challenge)

This was going very well, until I reached the medium section of the book. I thought I was pretty good at sudoku, but it turns out I'm only good at the easy ones. I'm not giving up on the book, or the puzzles, but it's gonna take me a whole lot longer than 2 weeks.

Current saved total: £50
Current donated total: £85