Psychiatrist Amir Levine’s first book explored different types of attachment. In his follow up, he explains how anyone can become more secure Psychiatrist Amir Levine’s first book explored different types of attachment. In his follow up, he explains how anyone can become more secure A mir Levine has been quietly working towards a second book for 16 years. When Attached, which he co-wrote with Rachel Heller, was published in 2010, it brought the categories for how we behave in relationships –