I recommend the boa constrictor manual, part of the herp library series. Slim book but some really good info about the pre ovulation swell and general timings. Havent found anything as good online.
since moving house a month ago, both my boas aren't feeding which is kinda strange and the male is always lying on the cold side of the tank really letting his temp drop. Both are still pretty good for picking up and handling but i am a bit concerned.
I think my male also may be a bit confused because he keeps stroking my back with his spurs!!