Three questions:

1. How do we approach mono-tone boards with overpairs that don't contain a FD? Is this even a checkback?

2. As played, am I too passive here on the flop vs. the c/r? My thought was that I am either beat (JJ,99,22,J9) or the BB has tons of equity vs. me (FDs, potentially with an overcard) and I'm unsure if my pool raises AJo here enough to justify a defend.

3. Can you recommend any resource/video on mono-tone boards in general? Would love to dig a little deeper here!