I generally ignore ads on the net, but one from TI keeps popping up and looked like it might be interesting. It is. It covers a number of issues that have appeared in the AAC forum in recent months. It is dated 2017-05, so lots of people here have probably already seen it. The actual title is The Signal e-book: A compendium of blog posts on op amp design topics
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slyt701
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slyt701