Beginner 4x4 futoshiki, one grid on each page and three levels to choose from: sixteen cells, the digits 1 to 4, a handful of inequality signs to obey. The friendliest size to learn the game, with every page in one book.
5x5 futoshiki puzzles, one grid per page: twenty-five cells, the digits 1 to 5 and signs to satisfy, at three levels of difficulty. The standard size of the game, with every page also in one book.
6x6 futoshiki puzzles, one grid per page, with thirty-six cells to fill from 1 to 6 under the inequality signs, at one of three levels. A size for solvers who like a longer chain of deductions, collected in one book.
7x7 futoshiki puzzles, one grid per page: forty-nine cells, the digits 1 to 7 and signs that link across the grid, at three levels. The largest grid of the game, for patient solvers, with every page in one book.
Twelve 4x4 calcudoku puzzles, one grid per page, in three levels: addition cages only, then addition and subtraction, then all four operations. The size to learn the game, with a book of all twelve.
Twelve 5x5 calcudoku puzzles, one grid per page, in three levels of operations: addition only, addition and subtraction, then all four. Ten to twelve cages per grid, the digits 1 to 5, and a book of all twelve.
Twelve 6x6 calcudoku puzzles, one grid per page, in three levels of operations: addition only, addition and subtraction, then all four. Fourteen to seventeen cages per grid, the digits 1 to 6, and a book of all twelve.
Four 4x4 killer sudoku grids on every sheet, sorted into easy sheets with two given digits per grid, medium sheets with none, and hard sheets with long cages. Short puzzles to solve one after another, and a book that holds every sheet.
Sheets of four 6x6 killer sudoku grids filled with the digits 1 to 6, in easy, medium and hard levels: compact practice between the 4x4 and the 9x9, also bound into a single book PDF.
Four classic 9x9 killer sudoku grids per sheet, at three levels: eight given digits on the easy sheets, none on the medium ones, four-cell cages on the hard ones. A compact format for regular solvers, collected in one book.
Four small 4x4 calcudoku grids per sheet, with the digits 1 to 4 and cages that call for sums, differences, products or quotients. Quick puzzles for children learning mental math, sorted by operations, with a book of every sheet.
Sheets of four 5x5 calcudoku grids, one step up from the 4x4: the digits 1 to 5 and cages of two to four cells, with addition only, addition and subtraction, or all four operations, and a book of every sheet.
Four 6x6 calcudoku grids per sheet, the largest size, with the digits 1 to 6 and cages to add, subtract, multiply or divide. A dense set for confident solvers, sorted by operations, with every sheet in one book.
Four 4x4 futoshiki grids on every sheet, from easy ones with extra clues up to hard ones with signs only. Short logic puzzles for children who know their numbers to 4, with a book of the whole set.
Sheets of four classic 5x5 futoshiki grids with the digits 1 to 5, in easy, medium and hard levels, each grid solvable by logic alone. A compact set for regular practice, gathered in a single book.
Four 6x6 futoshiki grids per sheet, each filled from 1 to 6 under plenty of inequality signs, sorted into easy, medium and hard sheets. A step up from 5x5 for solvers who enjoy longer deductions, bound in one book.
Sheets of four 7x7 futoshiki grids, the largest size of the game, with the digits 1 to 7 and long chains of inequality signs, in easy, medium and hard levels, all collected in one book.
Small kakuro grids, one per page: a 6x6 layout whose runs hold at most five digits, at three levels. The gentlest way into cross sums, with every page in one book.
8x8 kakuro grids, one per page: longer runs, up to six digits, and more places where runs cross, at Easy, Medium and Hard. The step after the 6x6 grids, collected in one book.
Full-size 10x10 kakuro, a grid to a page, where runs stretch to seven digits and gray clue squares sit in mirrored pairs, at Easy, Medium and Hard.
The largest kakuro, 12x12, printed one to a page: eight-digit runs and crossings everywhere, at three levels, for experienced solvers.