"Tsundoku" (n.) is the constant act of buying books, but never reading them. Specifically, it is letting books pile up in one's room so much that the owner never gets a chance to read all of them. This is done by the owners of the books, not by the booksellers. The origin of "Tsundoku" is a Japanese slang (積ん読) "tsun-doku". 「積ん読」 came from 「積んでおく」 "tsunde-oku" (to pile things up ready for later and leave) and 「読書」 "dokusho" (reading books). 「積んどく」 "tsundoku" is a euphonic change of 「積んでおく」.
English borrows precious few Japanese words, especially words easily confused with tsunami. However, here is a word that we need but occurs in no dictionary--just the definition of a sniglet. So, I thought I would toss it out for a 'sniglet' contest.
Since I am currently divesting myself of most of my library, I can offer as a prize some of my best books. For sure the "Oxford Dictionary of Euphemisms" and the "New York Times Dictionary of Misunderstood, Misused & Mispronounced Words". Substitutions will be possible.