I grew up Pentecostal. When I was just starting into ministry I was introduced to the work of Edith Blumhofer and enjoyed her work on Assemblies of God history.
Years later I was able to meet Vinson Synan a couple of times. He was another great historian and was a bridge from eyewitnesses of the Azusa Street Revival to the current time.
Both of these great voices of Pentecostal history have passed away recently. I am thankful their work lives on.