It is possible this is a niche indie release, a local academic paper, or a very recent work that hasn't been indexed by major databases yet. Potential Matches or Similar Titles
"Agua" is a common title for Spanish-language works. A notable recent "Agua" related book is Agua: A Novel by Begoña Oro, or various scientific papers on water management. Agua - Alex Roma.epub
If you have the .epub file on your device, here are the best ways to get a summary: It is possible this is a niche indie