Creator of puzzles - Big Book Kakuro 480 9x9 Puzzles (Volume 1)

Kakuro (also known as "Cross Sums", "Kakro") is a logic puzzle, a mathematical equivalent of crosswords.
The puzzle consists of a playing area of filled and empty cells similar to a crossword puzzle. Some black cells contain a diagonal slash from top left to bottom right with numbers in them, called "the clues". A number in the top right corner relates to an "across" clue and one in the bottom left a "down" clue.
The object of a kakuro is to insert digits from 1 to 9 into the white cells to t...