Angus Wells wrote two trilogies, the Godwars and The Book of Kingdoms. The GodWars series, I think is well written but it follows in the vain of the heroes journey where a mismatch group goes through insurmountable odds to obtain their goal in the end.
The main character is Calandryll Den Karynth, the second son of the Domm of Secca who we read early on is a disappointment to his father. Calandryll's older brother, Tobias is the heir apparent so the Domm decides that his younger son will become a priest as not to be a threat to his elder son's succession. At this point in the book, Calandryll is more of a scholar who's head is always in the books rather than a warrior like his elder sibling.
There's a treaty being worked out between Secca and a neighboring city state Aldarin through the ambassador of the latter, Lord Varent den Tarl. This man will become the instigator to the quest who is also a fair wizard and more. He enlist Calandryll's help to find a book that has the potential of awaken the war god, Tharn. He tells Calandryll that he wants to destroy the book but I had a hunch there was more to Varent's story. Even though I have read this book in it's entirety, I couldn't remember much of the storyline.
In the meantime Calandryll is shocked to find out that the woman he secretly loves is being bethrothed to his brother and that he will be going to the temple to become a priest. Before Callandryll knows all this, he seeks out a seer who can foretell his future. She sees him on a life changing path and travel as on a quest with two others.
Through rage and fustration after hearing his fate from his father, Calandryll goes out and ends up in a tavern in the seedy part of town. He meets one of the two in a tavern where he almost gets beat up for not having any money for the wine he drank. Calandryll is saved by Bracht of Kern, a freesword who later is hired by Varent to help Calandryll's journey to the far reaches in search of the Arcanum. Later in the book, the third member of the party, Katya of Vanu is added to the quest.
A long time ago the original gods of this world had to entomb their two sons who had been at war with each other after seeing how much devastation this was causing the world. The Arcanum is an ancient book that has spells that can release them from their slumber.
The trilogy follows the three who now have become friends through the ends of their knowledge of the world and back with the finding of the book. Throughout the series it is said that they are pre-destined by the gods. And they do get help from the younger gods who earn their existence to the demise of the slumbering ones. In the end the questers have to figure how to keep Tharn asleep forever.