Ownership of tablets and e-book readers saw a big spike over the holidays — in fact, it nearly doubled in the United States, according to a new study from the Pew Research Center’s Internet and American Life Project.

The study was based on telephone surveys conducted in mid-December and January, which found that ownership of both device types nearly doubled in just a month. Now a total of 29 percent of US adults own a tablet or an e-reader, or possibly both.