Why the violin on the cover of Effective C#?
There's no hidden meaning, really.
A friend asked me why there is a violin on the cover of Effective C# instead
of any other instrument.

The logic was actually pretty simple. A musical instrument seemed
logical for a C# book. At the time, four of the five members of my family played
some instrument. I play guitar, my wife plays piano, Lara plays flute, and Sarah
plays violin. (Scott has started playing the trumpet now, but that predates the
book).
The piano makes a silly cover. The guitar seemed wrong, and a flute on the
book cover looked a bit silly. So violin won by default.
Sort of like software design: Throw out all the lousy ideas, and the
one that's left is probably pretty good. At least I hope so.