Oh, it's quite simple really. It's alphabetical.
Chinese word for car is 汽車
which is anglicized as Qìchē and read as Quizhe, thus making it after the word Quiz. R goes after letter Q in the alphabet.
It is believable that the word Qìchē is the last section in the library's Q section before the R section, while the "Rash" section is possibly the first section in the library's R section. It might be the small or "weird" library, having many books on odd subjects.
That is if you ignore other words starting with R which would come before the word rash, such as
It should also be pointed out that almost all those previous words when read start with Re- while the rash is the first one which actually reads like Ra-. So the library might be arranged by phonetic pronunciation of the words and not how they are spelled.