If you’re smart, you’re always looking for ways to sharpen your cognition and improve your brain’s processing power. After all, being able to consume more information and digest it quickly means you can be more efficient and productive.

You can take speed-reading courses and employ tactics to improve your memory, but there’s also a way you can work smarter (and not harder): Instaread Book Summaries let you tackle your reading list quickly.

With this app, you can consume full books in just minutes. And, for a limited time, you can save an extra 20% on already-discounted subscription prices when you use coupon code HOLIDAY20 at checkout.

It’s a lot easier to create a reading list than it is to make progress on one. For many people, the time and energy to get through a book is harder and harder to find. Luckily, you don’t always need to read every word of a book to catch its meaning.

Instaread has rolled this principle into a popular app. It provides summaries of more than 500 New York Times Bestseller books, condensing them into digestible overviews with key takeaways that can be consumed in just minutes, by reading or listening. And for the last time, you can get a lifetime subscription to Instaread for $49.99 at Cult of Mac Deals.

We’re back for another round of the very best deals on gear and gadgets in the Cult of Mac Store. This week, we’ve got an extra huge Bluetooth shower speaker, a simple but powerful mobile VPN, a handy app for cutting down on reading times, and a set of workout-ready Bluetooth earbuds. Everything in this week’s roundup is discounted by 75 percent or more, read on for more details: