If you're like me and picked up this book because you engage with the excellent Healthy Minds meditation app (the author is the main contributor/narrator), I'd caution you that it primarily focuses on explaining key Buddhist teachings and practices, with meditation as a minor component.
With that said, I found this book to be an excellent primer. Dahl's writing is consistently warm, approachable, gentle, and clear, even when explaining HONESTLY CONFUSING IDEAS like "emptiness" (the vast amount of complexity and depth to any being's character that we normally reduce to superficial and simple categories/labels), "Buddha Nature" (our inherent capacity to transcend suffering, confusion, and selfishness), and "Samsara" (the constant cycle of all non-Buddha-natured people of striving towards things we want and pushing against things we don't want in a way that inevitably leaves us feeling dissatisfied with what we have/who we are). Dahl acknowledges the challenges of grasping these and many other concepts and shares his own struggles along his learning path, making it feel realistic to reach a similar understanding.
I do wish the book delved deeper into the process of meditation, though it does offer meditation examples in every section. I sense that this book is a gentle nudge towards actually walking down the Buddhist path yourself, rather than trying to fully explain every idea and provide a gradually more elaborate and complex set of meditations for you. Ultimately, if you're curious about learning more about Buddhism but feel nervous or embarrassed about visiting a temple or taking a course, I'd suggest reading this book over doing your own research on Reddit.