From meeting in a classroom to writing their debut book together, authors Jordan Gould and Richard Pritchard have come together once again for the next iteration in their book series, with plans for book merch soon.

Samoan teacher Richard Pritchard and Peek Whurrong student Jordan Gould have now returned with the second book in their series Custodians: Wylah the Koorie Warrior.

The self-confessed 'grade A' student and his teacher became fast friends and when Pritchard brought him the idea of Wylah, Gould jumped at the chance to work with him on something like that.

In the second book in the series, titled Custodians, the main character Wylah has succeeded in uniting the five Guardians.

Now she and her megafauna friends must journey through the Valley of Spirits to face the Dragon Army and become the Koorie Warrior.

Gould and Pritchard already had the idea for the second when the first book was published.

"We already had a rough idea of how the first three books were going to go," Gould said.

"So book one was done, now we're on book two and book two was practically done and we just needed to add a little more story.

"And it's the same with book three as well, we have a rough skeleton of it and now we just need to put some more into it."

Although Gould and Pritchard were working with existing characters in an existing world, when it came to finessing the second book they found one of the more challenging aspects was finding ways to push the characters together in new scenarios.

"The biggest challenge was stitching those characters back together in the plotline," Pritchard said.

"That was really really tough to figure out a way they could enter a new situation to find each other again.

"In our first book, they didn't do that but now it's the first time they meet again once they had established the relationship and that was really tough to figure that out."

While Gould and Pritchard have been working on their second book they have also been working on more Wylah content behind the scenes, including a card game.

Reminiscent of Yu-Gi-Oh or Pokemon, the pair have created a card game in an aim to help readers delve further into the Wylah world.

"Richard's kids love playing card games and I love playing card games so this was a bit of a project," Gould said.

Pritchard said they used the same artwork from their books on the cards to engage with readers who may have a favourite character to love or a favourite character to hate.

"The point is that kids can sort of read the book and then get these cards and match and battle with them and play with them," Pritchard said.

"And when we go in and talk to schools we get them to design characters with us.

"So we design them together and now it's a card and the kids can have that connection.

"We wanted to write books but we've always wanted to spread Aboriginal language and culture throughout Australia and I think this is a really great way of doing it."

At the heart of the Wylah series for Gould and Pritchard is the desire to educate others about First Nations culture.

"(We want to) teach them through like a fun way," Gould said.

"We don't want to bore kids with all of what has happened.

"We want to tell like a very exciting story and have kids be engaged."

Custodians: Wylah the Koorie Warrior is currently available in select bookstores.