Shadows Linger

Yes, Shadows Linger is the second book in Glen Cook's Black Company series and directly continues the story from the first novel, The Black Company (1984). The mercenary company is still in the service of the Lady, and key characters like Croaker, Raven, and the Taken carry over from the first book.

A major plotline of Shadows Linger takes place in the city of Juniper, where a mysterious black castle is slowly growing and drawing souls toward an ancient evil called the Dominator. The Lady, who herself is a powerful dark sorceress, fears the Dominator's return because he is an even older and more dangerous power.

The Lady is a powerful sorceress and tyrannical ruler who commands the Black Company through their contract of service. She is locked in a struggle against a rebellion led by the White Rose, but also fears the awakening of the Dominator, an ancient dark power who was her former master.

The White Rose (1985) is the third book and completes the initial trilogy sometimes called the 'Books of the North.' Glen Cook continued the series with several more trilogies, including the 'Books of the South' beginning with Shadow Games (1989).