Combined for the first time in one volume are the first three books of the internationally bestselling DRAGONTIARNA series: DRAGONTIARNA: KNIGHTS, DRAGONTIARNA: THIEVES, DRAGONTIARNA: GATES, and the bonus short story SHIELD KNIGHT: THIRD’S TALE. Ridmark Arban has defeated both the mighty Frostborn and the evil of the Seven Swords, and now he only wishes to live quietly with his family. But Ridmark's oldest enemy, the Warden of Urd Morlemoch, has not forgotten him. And the Warden knows a dangerous secret. For the dragons are returning...

Lu Bu? That was my defeat! Zhao Yun? That's my senior brother! Sun Ce? He has to call me teacher! Sun Quan? When did he ever see me? A novel about modern people travelling to the Three Kingdoms, a book about a soldier stealing grain and a gun.

About the book: This book is the first comprehensive review on acoustic metamaterials; novel materials which can manipulate sound waves in surprising ways, which include collimation, focusing, cloaking, sonic screening and extraordinary transmission. It covers both experimental and theoretical aspects of acoustic and elastic waves propagating in structured composites, with a focus on effective properties associated with negative refraction, lensing and cloaking. Most related books in the field address electromagnetic metamaterials and focus on numerical methods, and little (or no) experimental section. Each chapter will be authored by an acknowledged expert, amongst the topics covered will be experimental results on non-destructive imaging, cloaking by surface water waves, flexural waves in thin plates. Applications in medical ultrasound imaging and modeling of metamaterials will be emphasized too. The book can serve as a reference for researchers who wish to build a solid foundation of wave propagation in this class of novel materials.