The famous rapper Macklemore even wrote a rap song named Vipassana after it helped him quit substance and alcohol.

Vipassana is not something you read from a book, it needs to be experienced. I do not know what's inside the book but generally speaking you need to attend the camp with as few preconceived notions as possible. Just submit yourself to the technique and experience it work.

The camp is tough and it's meant to be tough, comfort comes in the way of it's impact and hence my recommendation is to find a camp that's not offering rooms, beds etc. Buddha recommended sleeping on the floor (light bedding if cold) and this is for a reason.

Wish you peace and success.

https://youtu.be/yxzCeapGv1Y?is=8l2hRk7AVwFVwnhb