Allison Murray/ZDNET Follow ZDNET:  Add us as a preferred source  on Google. Instead of buying several blank notebooks and getting confused about which one is for lists, which one is a gratitude journal, and which one is your personal planner, I've found one device that replaces them all: the Boox Note Air5 C .  Also: The best note-taking tablets you can buy And it appears ZDNET readers have found this E Ink tablet just as useful, as it is the second-most-bought tablet they have purchased so far this year, after the base model iPad . We gathered this data via links in ZDNET reviews, buying guides, and deals (don't worry, your privacy is protected -- we only have access to aggregate data from our user base, and there is no way for us to identify individual people's purchases).  What makes this particular Boox digital paper tablet stand out from others is how it writes. The combination of the Pen3 stylus and this tablet's screen makes it a true paperlike writing experience.…