The author and Goddess Fish Blog Tours allowed me to read this book for review (thank you). It has been published and you can buy a copy now.
Montague is a magician and Jeffery's best friend. He tells him when to wear the helmet, goes into battle with him, and collects a fee from the village elders for saving them. He uses his magic to make Jeffery forget the battle. That saves him from guilt and regret. They travel with a group of berserkers that makes others leave them alone.
Montague also has a traveler with him that presents itself as a boy but is really a girl. She's also a witch. What a variety of friends.
There is a warlord who wants that helmet and his men are hunting them. They have more than one encounter with them and they finally end up in jail. Where do they go from here? You'll have to read it and see.
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Happy reading and good luck!