In section 7.2, Using a Partially Signed Bitcoin Transaction, it might be helpful to give a little more explanation on why CoinJoins exist, what problems they solve and what are some real world implementations.
Note
I'd submit a pull request myself, but I'm not yet too familiar with how they work.
What
Add more explanation about CoinJoins
Why
In section 7.2, Using a Partially Signed Bitcoin Transaction, it might be helpful to give a little more explanation on why CoinJoins exist, what problems they solve and what are some real world implementations.
Note
I'd submit a pull request myself, but I'm not yet too familiar with how they work.