How about Delver Magic by Jeff Inlo
Quote from Kobo (there is a spoiler for a reason):
A rolling tremor passes through the land of Uton signaling a return of long absent magic as well as an ancient evil that accompanies it. Ryson Acumen, purebred delver, senses the changes and begins his explorations to discover the source behind the upheaval. In his investigations, he learns that legends he considered fables hold more truth than fantasy. The delver encounters elves and learns the Sphere of Ingar, a talisman that captured all magical energies long ago, is free from its tomb in Sanctum Mountain. As violent, evil creatures return to shred the very fabric of reality, the sphere gains awareness and chooses to spew corrupted magical energies to obliterate all life. The sphere must be destroyed, but it rests within Sanctum, a hollow mountain with a single path to its center. The way to the sphere remains defended by devices created long ago, forged by members of each race to thwart entry to the mountain's core. Those that wish to defeat the sphere must not only overcome these barriers, they must conquer the mistrust which has flourished during the long period of separation. Human, elf, dwarf, algor and delver must reunite to defeat the obstacles that now protect the sphere. Once inside Sanctum, representatives of each race face the secrets of the ages that once undone will change their lives forever.
I read the first three books a couple of years ago and enjoyed them.