Shadowbox is Elliott Line's second book, and features a brand new puzzle type: a cross between a 'Skeleton' crossword and a 'Fill-In' Crossword, you are given a list of words to insert, and a grid of grey and white squares. White squares MUST contain consonants, whereas grey squares might turn black or they might contain vowels. Using the symmetry of the final grid, the puzzles can all be solved by pure logic.