There are 3 books in the The Tale of the Five series. The newest book is The Door Into Sunset which came out in 1993.

1
The Door Into Fire

Book cover of The Door Into Fire
A sorcerous swordsmith desperate to achieve true power. His stubbornly nonmagical sword. His princely runaway lover. His hungry new fire elemental. Put them all together, and what can possibly go wrong?Herewiss is the only man in centuries to possess the Power of the blue Flame, but he can’t use or…
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3
The Door Into Sunset

Book cover of The Door Into Sunset
The sequel to The Door into Fire continues to follow the adventures of Freelorn, Herewiss, Segnbora, Sunspark, and Hasai. By the author of So You Want to Be a Wizard.