Every summer season, Kindle sales are the highest because people organize vacations and do not want to lug around stacks of books. The Kindle is the perfect travel companion: it occupies virtually no space, is as close to reading a real book as can be, and can hold thousands of books.

Kindle Unlimited gives you access to more than 4 million digital titles, including fiction, non-fiction, audiobooks, and magazines. It normally costs $11.99 per month, but during Prime Day, Prime members get three months free. I personally don't always read fast enough to justify the $11.99 a month, but I'll take three free months of it any day.

Carry your personal library without weighing down your beach bag or backpack. And do it for less if you act now.