Diabolically Hard Fireball Xwr

Solvers in search of devilishly hard crosswords will find the ultimate challenge in these 45 diabolical puzzles! Some are themed, some not—and others up the ante with metapuzzles: puzzles within puzzles designed to stump even ultrafans. Plus, many of the grids are larger than the usual 15×15 squares, with more fiendish clues to figure out. These’s absolutely nothing harder out there.