"Libraroid --Library Reservation-" is an app that allows you to check if there are books in the library and make a reservation. Notice ********************************* If Amazon's API is available in both paper and Kindle versions, it may return Kindle information (which is annoying). If it is Kindle information, it cannot be searched in the library because there is no ISBN. Therefore, I tried to limit the search to Amazon so as not to release the Kindle. However, if this is the case, books f