Firelight of Heaven by Elizabeth Klein

A dying world. A wasteland where people are starving. Can two brothers stop the evil?

After they witness a massacre, their simple life crashes around them. Armed only with an ancient sword and the warnings of an old man who claims to be their grandfather, they flee into a perilous world of destiny and magic. They must navigate a treacherous realm of myth and shadow where perils are never far away, where dark forces are sent to stop them.

They embark on a common destiny with an Elf girl to search for seven lost crystals that will heal their world. But it’s not that simple. All of the crystals are hidden in fearsome places by the vengeful tyrant bent on stopping them any way he can.

And there’s one dark secret that threatens to destroy their relationship forever.