Actually the fetters were covered right within the Canon (ref: http://www.accesstoinsight.org/lib/stud ... ml#fetters
I found the Visuddhamagga to be a great resource. The section that explained in great details about Anapanasati meditation is particularly helpful for me. Since I focused more on the breathing meditation section and not so much on the Kasina, I probably missed that "staring" section that you mentioned. Anyway, if you could provide specific reference and link and maybe someone on DhammaWheel who does Kasina practice might be able to clarify it for you..