Actually, given GURPS (and Warrior World's) Grand Unified Magic Theory, which explains the functioning of every possible method of spell casting, theory and spell books are actually both very interesting gifts. It allows his friends to delve into the nature of magic on another world and see if the GUMT applies on a multiversal level or can atleast explain magic in another universe with no more than the minor modification of shifting a few constants at the most.
Yes, that's a minor modification. It may have far reaching and awesome implications, but if the relations between the laws of nature remain the same the specific values aren't really that important. E=mc^2 remains the same even if a differing value of the speed of light in a vacuum leads to different results in the equation.
Yes, that's a minor modification. It may have far reaching and awesome implications, but if the relations between the laws of nature remain the same the specific values aren't really that important. E=mc^2 remains the same even if a differing value of the speed of light in a vacuum leads to different results in the equation.