The mainstream introduction, and the one written for non-monogamous relationships.
Verdict
Attached is the general introduction; Polysecure is the specialist follow-up. Attached explains the three main adult attachment styles and applies them to dating and monogamous partnership, and it assumes that structure throughout. Polysecure covers the same theory more briefly and then spends most of its length on attachment in consensual non-monogamy, including the trauma material Attached leaves alone. If you are monogamous, Attached is enough. If you are not, Polysecure is the one written for your situation.
| Attached | Polysecure | |
|---|---|---|
| Assumed relationship structure | Monogamous | Consensual non-monogamy |
| Attachment theory coverage | Full introduction | Condensed introduction |
| Trauma content | Little | Substantial |
| Practical dating guidance | Extensive | Some |
| Framework offered | Style identification | The HEARTS framework for security |
| Price | Around nine dollars | Around fifteen dollars |
You are dating or partnered monogamously and want to understand why the same dynamic keeps repeating. The book's most useful section is the one on how anxious and avoidant partners reinforce each other, and its practical advice about what to look for early is unusually concrete for a book built on research.
You are in or considering non-monogamy, where the standard attachment advice stops applying cleanly. Fern takes attachment seriously across multiple relationships rather than treating one as primary by default, and the chapters on trauma and on nervous system regulation give the book more depth than a structural guide would need.
No. Polysecure includes its own introduction to attachment theory. It is condensed, so if the theory is entirely new to you, reading Attached first makes Polysecure land better, but it is not a prerequisite.
No, and this is the most misused part of the popular version. Attachment security shifts with circumstance, with relationships and with therapy, and it is better understood as a set of tendencies than as a type you belong to. Treat a style label as a description of a pattern, not an identity.
No. Both are frameworks for understanding, and understanding a pattern is not the same as changing it while it is happening. If a relationship is in real difficulty, or if there is abuse involved, that needs a qualified professional rather than a book.
Comparison based on published manufacturer specifications and the general consensus of owner reports. We have not tested these units side by side. Confirm current prices and specifications before buying. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
If the pattern you are working on is compulsive caretaking, our Codependent No More review covers the popular label for it and why attachment literature describes the same behaviour with better evidence.