I really had no idea who David Wells was until this year. Wells spoke last month at the national conference for Desiring God ministries. I recently listened to an informative interview with him. The interview covers his background (he lived with John Stott for 6 years in the 60’s), his influences, and the thesis of each of his four major books. Take notes if you want to keep things straight, it covers a lot of ground.
My interest in Wells was peaked when I watched the promotional videos for the conference. I recommend you listen to the 9 Marks interview first then watch the videos.
This is a link to his most recent book (some really good comments here, read the one by Doug Groothius)
Just because I can never resist cramming in one more resource, if you do get to listen to the 9 Marks interview with Wells and you like it, then you will probably also really like this interview with Carl Trueman.
I am going to have to go through it again sometime just to write down the huge list of authors that he recommends reading.