Difficult Kakuro: 200 puzzles

Welcome to volume 2 of the series!
This is not just another book of Kakuro or Cross Sums puzzles. This is a book of BIG and DIFFICULT Kakuros, which will definitely test your solving skills!
There are 200 "crosswords with numbers" in here.The first 150 puzzles are your standard, but difficult, Kakuros in different sizes, from small 8x8 to some really big ones such as 18x18 or 15x20. The final 50 puzzles are Kakuro variants, including consecutive Kakuro, non-consecutive Kakuro, odd-even Kakur...