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All newly published in book form, Simplex 150 has been compiled by Mary O' Brien, who has been setting the Simplex crossword for more than 20 years

Here are another 150 puzzles from Ireland's favourite crossword.

The next book in the highly successful Simplex series.

Sudoku is a real cultural phenomenon: a French fad in the 1890s, a Japanese craze in the 1980s, it is peculiarly British obsession. This book contains 201 fiendish brainteasers, ranging from easy to mind-bogglingly difficult. It provides a daily fix for the hardened Sudoku fan and sets an addictive challenge for novices. It's more than a game.

The first ever Bumper Book of Simplex Crosswords. Containing 300 Simplex crosswords, all newly-published in book form, the first ever Bumper Book of Simplex Crosswords has been compiled by Mary O'Brien.

Don'ts for Husbands and Don'ts for Wives are facsimile editions of the original books published by A&C Black in 1913, containing hundreds of snippets of entertaining advice for a happy marriage, which rings true almost 100 years after they were written.

A new title in the Fiendish Su Doku series, concentrating entirely on the more difficult Super Fiendish puzzles. These are previously unpublished quality Su Doku grids from the puzzle providers to The Times, and help to develop you to take on Extreme Su Doku.

A collection of 200 previously unpublished Difficult Su Doku puzzles. Perfect for the more advanced Su Doku solver in need of a constant supply of challenging puzzles. Guaranteed to provide hours of absorbing, brain-stretching entertainment.

Don'ts for Husbands and Don'ts for Wives are facsimile editions of the original books published by A&C Black in 1913, containing hundreds of snippets of entertaining advice for a happy marriage, which rings true almost 100 years after they were written.

Appearing daily in the Irish Times for over forty years, the Simplex crossword has attracted a devoted following.