The Skaar Invasion by Terry Brooks is the second book in The Fall of Shannara books. I basically leaves off from where The Black Elfstone ended. The Skaar are a people whose land is failing and they are in search of a new home. Lead by their warrior princess, they show cunning and little mercy against their enemies. Meanwhile the remaining druid must find a way out of the vanished Paranor before he disappears completely. He must join forces with his friends before the lands are taken over by the Skaar and his former colleague.
“So much had happened in so short a time. She had made the journey to find Drisker and ask him to train her, and the Druid had taken her in. The Skaar had invaded the Four Lands and taken Paranor, killing all the Druids. Drisker’s home had been burned. Someone was trying to kill him, and now it appeared it was as he suspected—a fellow member of the fallen Druid order. Yet he had gone to Paranor, anyway, to try to save those he had once led. And she had gone in search of Tavo and found only the horrific death of her parents, the destruction of her home, and the enmity of her friends and neighbors. What had she accomplished in all this? Not much, she decided.”
If you like this type of book, you’ll like this novel (I did and do). You’ll have to get past the point where there will be an end. There will be one, but only after the end of the fourth in the series. By going forward you are committing to reading all four books as I will.