Sinister Sudoku (A Sudoku Mystery)
Murder By Numbers (A Sudoku Mystery)
Death by Sudoku (A Sudoku Mystery)
Ghost Sudoku (A Sudoku Mystery)
In Celebrity Sudoku (A Sudoku Mystery)
In Killer Sudoku (A Sudoku Mystery)
These books are part of a series of books from Berkley Prime Crime which includes Earlene Fowler with quilting mysteries featuring Benni Harper, Needlecraft mysteries, scrapbooking mysteries, knitting mysteries, decoupage mysteries and sewing circle mysteries.
I found the sudoku books entertaining and fun. The mysteries are interesting, with lots of characters, some humor, and the story of Liza's life is moving ahead in the story. The puzzles are placed in the book to fit at the top or bottom of a page, so they don't fit in exactly in place with the story, but once you know that, it isn't a big deal.
The tips are also educational, but I think reading the series in order might help with some of the explanations. Some of these explanations are cumbersome to read through - which is understandable when you have to explain where the number is and how it is related to other numbers in the set, but they do make sense if you pay attention and think it through one step at a time.
One problem with borrowing these books from the library is that another patron already filled out the solutions in one of the books. I did get some satisfaction when I noticed that a puzzle had been solved incorrectly. It is a rather difficult one, and I am still working on finding a way to solve it. In the book, someone gives a lecture on how to solve the difficult one, but the explanation is not given in the book, probably to keep the focus on the crime.