The Secret Of The Unicorn Queen -The Dark Gods by Josepha Sherman

 Maybe he knew exactly where the warriors were. Maybe he was just biding his time, playing with them as a cat played with a mouse. 
        Suddenly Sheila saw a light up ahead. And just as suddenly all her fears seemed ridiculous. Funny, how a little light made everything seem so- 
        "No!" 
        Pelu's horrified scream made Sheila whirl around—just in time to see one of the huge stone guards come lumbering out of the darkness. Before she could even raise her sword, the healer was caught up in a pair of mighty stone arms. 
        "Pelu!" 
        Dian and Sheila slashed frantically at the rock-man. But their swords just bounced off the thing's stony surface. Then it turned on them so suddenly that Dian went flying. She crashed into Sheila, and both girls were slammed to the floor. Winded, heart racing, Sheila struggled to get up, expecting a powerful stone foot to come stomping down on top of her at any second. 
        But instead the rock-man turned and strode swiftly away into the darkness, Pelu cradled helpless in its grasp. 
        Gasping, Dian and Sheila scrambled to their feet, bruised and aching. 
        "We've got to go after her!" panted Sheila. 
        "Too late! They're gone!" 
        "That's impossible. Come on—" 
        “Sheila, no! There must have been some sort of secret passage back there. I'm telling you, Pelu is gone!" Sheila stared fiercely down the corridor, but saw nothing but darkness. The rock-man and his captive might just as well have vanished into thin air. Evidently, the thing didn't need light to see where it was going. That meant it had probably been stalking them silently all the time they had thought they were alone. 
        "She'll be all right, Dian," she said firmly, hoping she was right. She was glad Dian couldn't see her trembling in the dim light. 
        "How can you be so sure?" Dian asked. 
        "Because . . . because . . . the rock-man could have killed Pelu easily enough. But it didn't. Even while it was knocking us over, it was very careful not to hurt her." 
        "But that means Kumuru must have her! Oh, Sheila, what are we going to do?" 
        "I don't know. I guess there's nothing we can do. Except . . . go on." And hope that Kumuru didn't know exactly where they were. 
        But he did. Even as the light they were approaching grew brighter and brighter, Dian gave a squeal of surprise. A panel in the floor of the passage had suddenly fallen away beneath her feet! 
        "Dian!" 
        Sheila snatched frantically at the other girl's arm. But her hand closed on empty air. With a wail of terror, Dian went sliding down a smooth, glassy slope and out of sight. Sheila threw herself flat trying to peer down the slope. 
    But the panel was noiselessly slipping back into place. No matter how Sheila pried and probed at it, it remained shut. 
        "Oh, Dian…” 
        Nobody answered. After a moment Sheila got to her feet again, feeling so alone that she wanted to burst out sobbing. She was tired of being brave! She wanted her parents, and her friends, Cookie and Dr. Reit. But unless she somehow got out of here and took the Tracker back from Mardock, she wasn't going to see any of them ever again! 
        The tears that were already welling threatened to spill over. But then Sheila sniffed, and quickly rubbed a hand across her eyes. Sure, she was scared, but crying wasn't going to do any good. If she was ever going to get out of this mess, she had better start thinking instead. Why were Pelu and Dian snatched away while nothing at all had happened to her? And why did Pelu's abductor strike only at Dian, as though Sheila had suddenly become invisible? 
        Oh, of course! The powers of the Dark Gods hadn't worked on her before, and plainly they still weren't working. Sure, Kumuru had been aware of Pelu and Dian. But, Sheila suddenly realized, he obviously had no idea she was here. 
        But you will soon, Kumuru! she