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Katie McDonald's old friend Professor P. T. Avondale has asked her back home to help him with a problem.  So Katie takes a break from her mathematical think tank job.  In school Katie was a "geek" and never fit in.  That is until the professor took her under his wing at his puzzle museum.

When Katie arrives, she finds the puzzle museum isn't looking so good any more.  Plus the mean receptionist doesn't make visitors feel welcome.  The professor tells Katie that the bank has threatened foreclosure, and he wants her help in finding where the payments went.  When she finds the professor stabbed to death, she knows something is definitely amiss.

This was such a fun mystery to read.  I found myself not wanting to put it down to figure out who did it and why.  Katie is such a fun character, too.  The author did a great job of intertwining information about Sudoku along with the fabulous mystery.  It makes for such an enjoyable cozy mystery read.

I highly recommend this book.  I can't wait to read #2.

Dawn Dowdle