What is the etymology and usage of 爱不释手
爱不释手 is idiom in Chinese. You cannot split and use it. In most time, we use it as adjective or adverb to describe that you love something very much. 

Common Usage:


爱不释手的{Object}
他对他的{Object}爱不释手
{Object}让我爱不释手


Sorry ,I miss the etymology:

南朝·梁·萧统《陶渊明集序》：“余爱嗜其文，不能释手。”