The main differences between the book and the VPI are contact area, weight and magnetic effect.
The Dictionary is paper so it is fairly non resonate, contacts a larger area than the VPI and has no effect magnetically.
Inside the VPI brick are stacks of steel plate that appear to be metal shop scrap. These steel plates have mass, but also are magnetic and disrupt electrical field. This is good or bad depending on who you want to believe.
My personal tests find the VPI to be the worst solution for the highest price. Better effect may be had with a plastic box full of lead shot or sand. With the home made version you get mass without magnetic disruption.
Anything as large as a book could block air vents. Probably more an issue for tube amps than your CD player. You should give it a try and report back with results.
The Dictionary is paper so it is fairly non resonate, contacts a larger area than the VPI and has no effect magnetically.
Inside the VPI brick are stacks of steel plate that appear to be metal shop scrap. These steel plates have mass, but also are magnetic and disrupt electrical field. This is good or bad depending on who you want to believe.
My personal tests find the VPI to be the worst solution for the highest price. Better effect may be had with a plastic box full of lead shot or sand. With the home made version you get mass without magnetic disruption.
Anything as large as a book could block air vents. Probably more an issue for tube amps than your CD player. You should give it a try and report back with results.