Amazon has introduced a new feature called Page Flip which will allow ebook readers to flip forwards and backwards between pages without losing their place. Page Flip automatically saves the page you're reading, and pins it to the side of the screen while you flip through the other pages. You can also zoom out and get a birds-eye view of the book. 

It's a particularly useful feature if you're looking for specific pictures in a book, or if you're flipping back and forth between a map and the story while reading something like Lord of the Rings. As long as the e-book you're reading has it enabled, you'll be able to use the feature. Compatible books will be marked "Page Flip: Enabled" in the features list. 

“Page Flip makes it easier than ever to refer back to pictures in a political memoir, flip back and forth between a map and your current page in an epic fantasy series, or find passages you’ve highlighted in an investing guide,” said Chuck Moore, vice president, Kindle. “With Page Flip, we’ve taken inspiration from how people read print books and improved upon it.”

The feature is available to download now as a free over-the-air software update for Kindle ebook readers, Fire tablets and the mobile app on iOS or Android.