Riches has good suggestions! I also like Adrien Rogers has excellant CD 's on the Holy Spitit. (Lwf.org) Some of the best ive heard. Also Dr David Jeremiah.Org ( turning Point ministries) excellant! I have started a cd collection. BILLY GRAHAM has a good-( easy read ) book on the Holy Spirit!
Google or search YouTube for any or all of the following: John Piper, Louie Giglio, Max Lucado. There is also a couple of sites: www.sermonaudio.com , and discipleshiplibrary.com where you can search by name or topic or passage of the Bible. God bless.