Instruct: Classify Amazon reviews into positive or negative sentiment
Query: kindle

several points:1- not enough academic books2- not enough reduction prices on academic ebooks. Paperbook3- pdf. files are not easy to read for a long period. U must change that when you create your kindle app store.4- provide more opportunity to read different types of format5- ABOVE ALL, THE CLICKS AND LIGHTS WHEN YOU CHANGE PAGE PROVOKE HEADACHE IF I READ FOR MORE THAN 1H30 MN.Apart from that, it is practical.I would appreciate to have some feedbackrgds