Novice to BCEL

Hi BCEL Geeks,

I'm new to BCEL and I wanna know where exactly can I find tutorials and
references pertaining to this technology. I'm basically willing to develop a
tiny wrapper framework using BCEL to instrument/insert probes dynamically in
some proprietary Java API's for unit testing purpose.

Kindly suggest if there are any Books available in market on BCEL framework.

Thanks,
Mohan