Hunting down who wrote 'A Dangerous Obsession' can turn into a little detective mission, because that title has been used by more than one author across different genres. I’ve bumped into this exact snag when trying to track down a paperback I loved years ago: sometimes a romantic suspense, a thriller, and a small-press domestic suspense will all share the same name, and without an ISBN or a cover image it’s easy to mix them up.
If you want a straightforward route, start with the ISBN on the back cover or the front-matter inside the book — punching that into WorldCat, Google Books, or even Amazon almost always gives you the exact author, edition, and publisher. If you only have the title, try quoting it in searches like "'A Dangerous Obsession'" and add a keyword you remember (a character name, setting, or year). Goodreads and LibraryThing are lifesavers for this kind of thing because readers tag editions and leave cover photos, and WorldCat will show library holdings worldwide, which helps if the book is older or out of print.
I get a bit giddy when I finally nail the right edition — it’s like finding the right key for a locked box — and then I can dive back into related reads, author bibliographies, and reviews. Happy hunting, and hope you find the exact 'A Dangerous Obsession' you were after — I always enjoy tracking down a mystery like that.