Drug Addiction Recovery Literature Ideas?

My mom has 5 months clean from abusing prescription drugs and I would like to buy her a book for her birthday about recovery. She has been regularly attending Narcotics Anonymous meetings, and through that program she has read one book and started another. She is very involved and serious about staying clean. I want to buy her something inspirational, and keep her spirits up. If you have any ideas please let me know! Thanks so much!!!

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