Translation

積ん読 / 本の買い溜め / 書籍の過剰収集

Meaning

The compulsive accumulation of large quantities of books, often exceeding the space available to store or the time available to read them.

Examples

• Her friends jokingly called her collection book hoarding, but she insisted every volume was essential for her future research.
  Her friends jokingly called her collection book hoarding, but she insisted every volume was essential for her future research.
• The small apartment felt cramped due to years of unchecked book hoarding.
  The small apartment felt cramped due to years of unchecked book hoarding.