the son of neptune series in order

What Is The Son of Neptune?

The Son of Neptune isn’t its own series—it’s the second book in the Heroes of Olympus fivebook saga. But many readers confuse it as the name of the whole series because it’s one of the most memorable titles. It features Percy Jackson, back in action but with memory loss, venturing into Roman camp territory with two new demigods, Hazel and Frank.

So when people search for the son of neptune series in order, they’re usually trying to figure out how to read the Heroes of Olympus series from start to finish.

Reading The Son of Neptune Series in Order: The Right Sequence

Reading the Heroes of Olympus books in order is crucial—not just because the plot is serialized, but because a lot of the emotional punch rides on character development over time.

Here’s the proper order:

1. The Lost Hero – Introduces new demigods Jason, Piper, and Leo.
2. The Son of Neptune – Brings Percy back into the fold and shifts the perspective to Roman mythology.
3. The Mark of Athena – The Greek and Roman demigods finally team up. Chaos ensues.
4. The House of Hades – A darker, more intense quest that pushes every character to the edge.
5. The Blood of Olympus – The final showdown with the powerful Earth goddess Gaia.

So, to be clear: The Son of Neptune is book two. If you jump in there without reading The Lost Hero, you’ll be missing key backstory.

Why the Order Matters

Each book in the series layers characters, mythologies, and quests. Confusing the order disrupts that flow. When characters reference past events or previous challenges, those callbacks carry weight—assuming you know what they’re talking about.

Also, these are ensemble stories. Missing a book means missing character arcs and big moments that deepen your connection to the crew.

The Son of Neptune reveals huge pieces of the puzzle from a Roman perspective, but it’s only part of the whole. You won’t grasp the stakes without proper buildup.

Pro Tips for FirstTime Readers

Start with the Percy Jackson & The Olympians series. It’s not mandatory, but it sets the stage and introduces core characters. That includes Percy himself. Don’t try to skip around. These books are like one long novel split into five volumes. Take note of the switching perspectives. You’ll get inside the heads of different demigods each time, which adds depth if you read in order.

Beyond The Son of Neptune: Next Steps

Once you’ve finished reading the son of neptune series in order, you’re in good shape to keep going in Riordan’s mythological world.

Here’s a suggested progression:

1. The Trials of Apollo series – Picks up events right after The Blood of Olympus.
2. Magnus Chase and the Gods of Asgard – Set in the same universe but focused on Norse mythology.
3. The Kane Chronicles – Egyptian myth, tangentially related but still worth reading.

Final Thoughts: Get the Order Right, Enjoy the Ride

It’s easy to see why people get confused when searching for the son of neptune series in order. Rick Riordan’s interconnected mythological sagas span dozens of characters and intertwining plots. But with a little guidance, the path becomes clear.

Start with The Lost Hero, continue through all five Heroes of Olympus titles, and let Riordan’s fastpaced, witty world do the rest. And above all—don’t skip The Son of Neptune. It’s not just a good book, it’s the spine that links Percy to the next generation of heroes.