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The Square Root of Murder (PC Hawke, Bk 5)
The Square Root of Murder - PC Hawke, Bk 5 Author:Paul Zindel When the grim reaper strikes the math department at Columbia University, everyone's just happy to get out of their homework for the week. But P.C. and Mackenzie do some homework of their own and discover that almost everyone -- parents and students alike -- had a motive to get this nutty professor out of the way.