How to help my dad back to Christ

My dad has been baptized but he hasn't been following God for years. He has a bible but never reads it (atleast from what I've seen cause my parents are divorced and I spend summer and winter with him). Last summer I asked if we could go to church one time and he was okay with it so we went but the church was one my mom and dad had gone to so I didn't ask again. By the way my dad and mom are a very touchy subject so I tend not to talk about my mom with my dad and vice versa. My brother got save today and I was thinking "Yay now all my family is saved and ill see them all in heaven but then I remembered my dad and this huge burden filled my heart so I want to make it my duty to help him back on the path to God. Please help me. I need advice. I know I'm going to be asking for Gods help but I need a basic idea of what to do.
Asked Nov 23, 2015

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