Fantasy series about search to find and reunite a mythical sword, shield and helmet

Question

I'm looking for help identifying a series I read in the mid 2000's which was originally published in English.

• There were 3 or 4 books in the series
• It was a fantasy series aimed at probably young teens
• I think there were two main characters who were in their teens (I think one boy and one girl)
• Something was happening in their world (which I'm fairly sure was a pre-industrial world so no electricity etc.), a war or conflict was coming and they had to find a missing sword, helmet, shield (and possibly one other thing) which would help them overcome it
• These objects were hidden in different places in different cities
• One of the objects was hidden at the top of a really big water fountain
• From memory the covers were quite plain, a coloured background with the title and author, and a picture/drawing of the object they were searching for in that particular book in the centre

It's not much to go on, but any help would be much appreciated!

Answer 1

The Golden Armor

This series, written by Richard Brown, comprises The Helmet, The Shield, The Spurs, and The Sword.

There is a conflict for which they need those items. To quote Goodreads:

Cassie and Keiron have spend all their life on the freezing North Island, where their life is happy and settled. But a strange prince has come to their shores, a man with darkness in his eyes and ice in his veins. And now the race is on to find the magical Golden Helmet.

The images are as described.