The Kindle ebook reader has become something of a hit for Amazon, with the company selling tens of millions of the devices to veracious bookworms since their release back in 2007.

If you're looking to pick one up, then good news – today is one of the best times to buy, thanks to the big discounts that Amazon offers on the range come Prime Day. With some models offering up to $45 off, now is the time to take the plunge, especially if you're after the standard Kindle or Paperwhite Kindle.

Bad news for those after the Oasis, Amazon's premium Kindle – Amazon isn't offering a discount just yet. Perhaps it's understandable, given that the model is only available for pre-order at the moment and doesn't even release until next week.

Remember, these deals will only last until midnight July 16th

Struggling to work out which Kindle model is right for you? There are three models available from Amazon, all of which offer slightly different features:

Amazon Kindle – This is the ‘basic' Kindle. Usually costing $89, you can get one today for $59.99. It's a great little e-book reader, with a front-lit screen, 4-week battery life and a 6-inch screen. A super choice for a low-cost Kindle.

Amazon Kindle Paperwhite – Usually $129, but available today for $84.99, the Paperwhite builds on the standard Kindle and adds a higher resolution screen, an adjustable backlight, more storage, and is also waterproof, making it a great choice for reading by the pool, in the bath, or wherever H2O is. It's Tech.co's top pick for those wanting a Kindle, offering a solid feature list for the price.

Amazon Kindle Oasis – The daddy of the Kindle range, the new Oasis is a pricey proposition. It's pre-order for $249 (shipping next week), with no discounts this Prime Day. For the money, you get a larger, 7-inch screen, and a warm light, for a more natural reading feel. While there's no doubting it's an excellent e-reader, we struggle to justify the price tag over the Paperwhite.

Want to find out more about the Kindle range? Read our dedicated Amazon Kindle guide.

Kindle Unlimited

Kindle Unlimited is Amazon's virtual library, offering over 1 million books to read without having to purchase them outright. It also has a range of magazines and thousands of audio books too.

Usually this service is priced at $9.99 per month, but to celebrate Prime Day, it's currently on offer for $0.99 for the first three months, marking quite a large saving.

You don't need to own a Kindle device to access the books either, the Kindle app is available on a variety of devices, from tablets, phone and laptops, so even if you haven't brought into the Kindle infrastructure, you'll still be able to read the books.