近幾年在海外駐村和在地研究的累積下，劉玗交織出以金礦為主題的創作計畫，個展「凹凸史」則作為階段性的發表。礦業驅使人的移動，採礦人口的聚集大幅改變地景，而礦脈採盡之後迅速凋零的村落，在美國成為一系列帶狀的鬼鎮，在台灣則因人口密度的差異，部分轉型為觀光景點，泰半則回歸自然，融入亞熱帶的地景。這本書作為衍生物、同時也可視作展覽的延伸閱讀，以隨機的日常瑣事文字段落與關鍵詞、事件的資料構成內容。在形式上，單線圈裝訂的對裁內頁可任意翻動，試圖打破線性閱讀的行進方式，讓讀者自行拼湊藝術家在頁與頁之間留下的蛛絲馬跡。

Cumulating via oversea residency projects and local researches these years, the artist Liu Yu has woven out a creative project themed with gold mine, presented in a form of solo exhibition The History of the Concave and the Convex. Mining industry moves people, gathers mining population, and alters landscapes drastically. Nevertheless, villages are desolated as soon as the mines depleted, lining up strings of ghost towns on the U.S soil. In Taiwan, thanks to the difference in population density, some are transformed into tourist attractions, while the others return to the Nature, blending themselves into the subtropical landscape. The book is a spinoff from the exhibition as well as an extensive reading material by offering passages of random daily trivia and datas regarding to key words and events. With pages cut into half in single coil binding, the book has been constructed in a fragmental style, leaving trails and clues to the readers to follow, to complete the stories.