@Jody Hatton's Videos 
thanks a lot for your videos, as soon as i can connect my PayPal account to my credit card i'll buy the tracks. I have a question: during exams I study for 10 hours/day how it's dangerous to listen to this track during all that time? I usually take 15 minutes break every 90 minutes and sometimes i make a little break 45minutes in and pause the track
It's up to you! I'm a fan of not trying to force my brain to work too hard, but some people go all day. Just promise me you'll stop when you start feeling dizzy. ;)
Marta Siani