Amazon could be trying the Netflix model for e-books soon. A Web page introducing a subscription service promising unlimited access to a vast library of Kindle digital books appeared and then quickly vanished on Wednesday. A snapshot of the page stored in a Google cache captured online retail titan and Kindle-maker Amazon touting unfettered access to more than 600,000 titles along with thousands audiobooks for a monthly fee of $10. Works pictured on the page included Water for Elephants, Life of Pi, and Flash Boys along with complete collections of Harry Potter, Hunger Games, and Lord of the Rings books.