Interest
Proportion of Hacker News items mentioning "hardcover" over time.
Mentions
Total number of Hacker News items mentioning "hardcover" over time.
A hardcover, hard cover, or hardback book is one bound with rigid protective covers. It has a flexible, sewn spine which allows the book to lie flat on a surface when opened. Modern hardcovers may have the pages glued onto the spine in much the same way as paperbacks. Following the ISBN sequence numbers, books of this type may be identified by the abbreviation Hbk. Read more on Wikipedia