Yes, I know this is only the second such book I've tried -- but I am not full of optimism.
I am thus far underwhelmed by (and sometimes outright fail-boggled by) Barbara Cawthorne Crafton's book Jesus Wept: When Faith and Depression Meet. I don't even know what I want a Christian book on mental illness to do or say or include (so I don't know how I would even begin writing one myself -- even leaving aside the issue that, as someone who doesn't have any mental illness, I don't think I should be the one to write that book) but thus far I am not finding it.