# Coupon for Cognitive Productivity with macOS

**URL:** https://discourse.hookproductivity.com/t/coupon-for-cognitive-productivity-with-macos/9871
**Category:** Announcements
**Created:** [August 3, 2026, 10:07pm UTC](https://discourse.hookproductivity.com/t/coupon-for-cognitive-productivity-with-macos/9871 "2026-08-03T22:07:34Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![LucB](https://discourse.hookproductivity.com/user_avatar/discourse.hookproductivity.com/lucb/32/2228_2.png) [@LucB](https://discourse.hookproductivity.com/u/LucB)
#### Post date: [August 3, 2026, 10:07pm UTC](https://discourse.hookproductivity.com/t/coupon-for-cognitive-productivity-with-macos/9871/1 "2026-08-03T22:07:35Z")

</div>

Hookmark is a tool we designed to fit into the suite of tools required for Cognitive Productivity. In fact my first Cognitive Productivity book, [_Cognitive Productivity: Using Knowledge to Become Profoundly Effective_](https://leanpub.com/cognitiveproductivity/) contained requirements for Hookmark not expressed as requirements explicitly.

So I think my 2 [_Cognitive Productivity_ books](https://cogzest.com/books/) are useful for our users.

Here’s a coupon URL where you can get _Cognitive Productivity with macOS: 7 Principles for Getting Smarter with Knowledge_ on Leanpub for $5.00 instead of $15:

> **[Cognitive Productivity with macOS](https://leanpub.com/cognitive-productivity-macos/c/Hookmarkapp)**
>
> A screencast-filled book demonstrating how to use macOS apps to boost your cognitive productivity.

valid for a limited time. There’s no other book on it.

Here are the seven principles it describes:

### I. Principles of self-governance

- Principle 1: Lead yourself with knowledge
- Principle 2: Manage your cognitive life mindfully

### II. Principles of productive information-processing

- Principle 3: Assess analytically
- Principle 4. Surf strategically
- Principle 5. Delve deeply

### III. Principles of mastery

- Principle 6. Practice productively
- Principle 7. Apply knowledge

Usage of Skim is mainly in the Delve deeply principle.