Logic puzzles & games are my thing!
Crosswords, sudoku, kakuro, chess etc etc.
My novels have a puzzle at their heart that the heroes & heroines have to solve before taking on the bad guys or saving the world.
But the puzzles are set so that you the reader have an equal chance to solve them before the hero does.
Or you can just sit back and let the hero do all the work!
Either way, my wish is that when you get to 'The End' you'll say "great yarn, clever".
Let me know what you think.
See www.mallaktech.co.uk/ebooks

By the way, I live with my wife in Pembrokeshire, Wales, UK; have 3 grown-up kiddies, no cats or dogs, and 4 goldfish - correction 3, one just died! 

In the winter we run a ski chalet in the Alps and in the summer we teach wannabe students how to become ski chalet hosts, hence we have some publications from that venture, plus a few miscellaneous life-style books.
Take a look at www.CocoCookery.co.uk

In our free-time we fire up the campervan and head for Europe - some place warm.