I don't have the book/code, but that code does look invalid -- perhaps it did work back in 2000 on old compilers. Isensee is a MS guy, so he probably wrote that code on MSVC6.
The previous C++ standards were published in 1998 and 2003, and Microsoft didn't really start adhering to them properly until ~2005.
AFAIK, you can only use types or integral values as template parameters, not floats.
On MSVC 2008 I tested and got this error:template<float f> struct Test {}; <-- error C2993: 'float' : illegal type for non-type template parameter 'f'
Test<0.0f> asdf;