Solve Sudoku Puzzles

extreme sudoku book suggestions?

im looking 4 a xmas present 4 my dad he LOVES sudoku, but i cant find1hard enough…thought maybe someone out there would have some suggestions? He has completed the absolutly nasty sudoku level 4 already…..HELP PLEASE!

I would suggest these books:

1. Extreme Sudoku – by Tetsuya Nishio

http://www.amazon.com/Extreme-Sudoku-Tetsuya-Nishio/dp/1934287105

2. Extreme Sudoku – by Carol Vorderman

http://www.amazon.com/Extreme-Sudoku-Carol-Vorderman/dp/0307346463

3. Extreme Su Doku Gift Set – by Wayne Gould

http://www.amazon.co.uk/Extreme-Doku-Gift-Wayne-Gould/dp/0007266073

4. Extreme Sudoku – by Nikoli Publishing

http://www.amazon.co.uk/Extreme-Sudoku-Nikoli-Publishing/dp/0761146229/ref=sr_1_4?s=books&ie=UTF8&qid=1291278349&sr=1-4

5. Extreme Sudoku – by John Pazzelli

http://www.amazon.co.uk/Extreme-Sudoku-John-Pazzelli/dp/0486450775/ref=sr_1_9?s=books&ie=UTF8&qid=1291278349&sr=1-9

6. Extreme Sudoku: 101 Tricky Puzzles for the Advanced Player – by Orient

http://www.amazon.co.uk/Extreme-Sudoku-Tricky-Puzzles-Advanced/dp/8122204597/ref=sr_1_11?s=books&ie=UTF8&qid=1291278349&sr=1-11

Extreme Baby Surfing ; 9 month old Baby goes surfing for the first time

Value Sudoku: Everything Edition – 1000 Puzzles at 4 Difficulty Levels $5.77 Simple! Common! Demanding! Harrowing! Value Sudoku Everything Edition gives you 1000 puzzles at four levels of increasing difficulty to engage minds at all skill levels. Each puzzle is included in the solutions section, making it easy to check your answers or get that hint you desperately need! Collect all nine Value Sudoku books to reveal a bonus puzzle on the spine of the books!…

Star Sudoku 3-pak (Total of 900 Puzzles, Level 3, Not-so-easy; Level 5, Very Hard; Level 6, Extreme) …

Star Sudoku Level 6 SUDOKU PUZZLES ARE EASY TO SOLVE AND TOTALLY ADDICTIVE. THEY PRESENT A LOGICAL CHALLENGE AND DO NOT REQUIRE ANY ADDING OR SUBTRACTING OF NUMBERS TO COMPLETE. YOU DON’T NEED A BIG VOCABULARY OR A DEGREE IN MATH TO ENJOY THESE PUZZLES – JUST THE ABILITY TO THINK LOGICALLY. THIS BOOK CONTAINS 300 EXTREME PUZZLES AND IS IDEAL FOR THOSE WHO KNOW HOW TO SOLVE SUDOKU AND WANT A REAL CHALLENGE….