That's a good advice and I'll definitely grab them off that store but, just out of my (noobish) curiosity, which format are they in? If they work on my kobo they must be epub I guess but how they work on a kindle too? There's no indication nor question during the purchase process about which format we want to download them into. In any case, epub is not the same as kepub. I'm perfectly fine with standard epub but some may prefer kepub (for formatting, navigation, syncronization and stats' sake)
And btw, 3 are missing, but are those available on the kobo store so it's no biggie