Wikipedia, unironically. The 'Molly Murphy' series page is well-sourced and lists every novel in publication order with the year. It's a dry but functional resource. I use it as a quick reference all the time. The discussion tab sometimes has debates about continuity, which can be interesting to skim. It's not as pretty as a fan site, but for a straightforward, verified list, you can't beat it. Just be sure you're on the series page, not just the author page, to get the specific sequence.
I read them wildly out of order based on what my library had available, and I regret it. I spoiled a major romantic development for myself because I read a later book first. The mysteries were fine, but the personal stuff was a jumbled mess in my head.
I eventually started over from book one and it was a much richer experience. Learn from my mistake!
I stumbled upon this series years ago and got hooked, but the order threw me for a loop at first because some lists mix up the original novels and the later anthologies. You want to start with 'Murphy's Law' – it's the origin story for Molly in 1901 New York. Then just go by publication date: 'Death of Riley', 'For the Love of Mike', and so on. I'd skip the anthologies like 'The Molly Murphy Mysteries' until you've read the core novels they collect, or you'll hit major spoilers.
A quick tip – the author, Rhys Bowen, also writes the Royal Spyness series, and there's a tiny bit of stylistic crossover in the early books. The reading order gets really solid around book four or five; the character dynamics with Daniel Sullivan and the historical details about early 20th-century New York become the backbone of the whole thing. My paperback copy of 'In Like Flynn' has a list in the front that I still check sometimes.
Never gets old explaining the Molly Murphy order. Start with 'Murphy's Law'—that's where it all kicks off in 1901 New York. The series follows her cases chronologically, so publication order is the intended reading experience. You could technically jump around, but you'd miss the character growth and lingering plot threads.
'Death of Riley', 'For the Love of Mike', and 'In Like Flynn' come next. By 'In Dublin's Fair City', she's back in Ireland, which is a great change of scenery. Honestly, sticking to the list on Rhys Bowen's website is your safest bet, as she's the author and knows the timeline best.
You could technically read any book for the mystery, but you'd miss so much context. Why is she anxious around police? Why does she live where she does? Her entire life situation is explained progressively from book one onward.
The audiobook point is a big one for me too. Nicola Barber's narration for the entire series is consistently fantastic. But there's a rawness to her performance in 'Murphy's Law' that matches Molly's journey. The accent work, the emotion—it's all pitched perfectly for a newcomer to this world. If you start with a later book where her performance is more polished and Molly is more confident, you might not connect as deeply with the struggle that defines her. The audio of Book 1 is an experience in itself.