The official freehand technique book by Johnny Rabb is a must for who want to practice the freehand technique (one hand[ed] roll) and gain a superfast single hand roll.
You can buy the book or start downloading the official free excerpt (5mb pdf file): there’s more or less all the basics you need to know about this technique
Video
- Johnny Rabb demonstrates freehand tecnique
- Johnny Rabb Freehand Technique (bad video quality, good audio explanation)
- Frehand technique definition