A good resource in general is The Teaching Company which produces The Great Courses.

Not books, but dvd's of college courses, typically about 300 level but also intro courses too, from places like Columbia, Harvard, etc.

Pick a subject, they likely have a course. I've found these instructors to be engaging and honest about what they know, what they don't, and what they suppose is likely (this applies to the sciences as well as history).

Many of them you can just listen to. I get them from my local library and convert them to video and audio files.

Circadian biology here.

Internal Time, by Till Roenneberg. Written by one of the "old guards" of the circadian field, old enough that he could be considered a founding father of the field in his own right.

The book is written as a collection of short stories, each one about a real circadian experiment or phenomenon that occurred, and the book invites you to interpret and think about the short stories before explaining the deeper biology and history behind the stories. It's a very fascinating book and quite approachable for a non-scientific audience, though I think it's very appropriate even for a scientific audience

Maybe a bit heavy unless you have at least some background in mathematics, physics, or chemistry, but "Quantum mechanics and path integrals" by Feynman and Hibbs is fantastically well written.

If you ever want to read about, understand, or dabble in quantum mechanics, this is the book you want to read. It's great because of how Richard Feynman expresses things: It's very verbal, and feels so much more based in intuition and physical common sense than the mathematical rigor that often makes texts in the field near unreadable.

Steven Pinker's The Language Instinct is a famously great, engaging, and approachable introduction to the field of linguistics for anyone interested.

Rust: The Longest War, by Jonathan Waldman. It somehow makes metal corrosion interesting.

Also Napoleon's Buttons by Penny Le Couteur, a good look at chemistry throughout history.

As an immunologist I absolutely love the book Immune by Philip Dettmer (the guy behind kurzgesagt)

Omg. I went to a Michio Kaku "lecture" like 15 years ago. Had no idea what he was about, it just seemed like an interesting way to spend an evening.

The entire hour and a half was painting his achievements like biggest thing since sliced bread, and trying to sell his books. I am still not even sure if he's educated in his field or if he fell into it by speaking with a patronizing affect

Edit: to answer your question. I enjoyed Live Long and Evolve: What Star Trek Can Teach Us about Evolution, Genetics, and Life on Other Worlds by Mohammed Noor

but I admit I haven't read it since I began my Biology degree. I'll have to read it again!

Hartmann & Kester's Plant Propagation: Principles and Practices is great for Horticulture, Botany and Phytobiology. I even memorised the Krebs Cycle using it and I fucking hated learning the Krebs cycle.

Geology is such a broad field, I couldn't recommend just one book. Now if you want to know about a specific field of geology, I can probably point you in the right direction.

Not exactly my discipline, but closely related: A Theory of Fun by Raph Koster is probably the closest thing to a pop-sci book about game design.

Well-regarded, well-written, and very approachable.

Annals of the Former World is great, for a physical/historical/structural geology primer that's also a digestible travelogue.

Stephen Jay Gould did a lot to make shale interesting in his book on the Cambrian Explosion.

I'm a fan of 'your inner fish' by Neil Shubin. Slightly dated, but the information is still good.

Might be a bit more basic and/or wide in scope than what you want but just in case it's worth picking up anything by Karl Kruszelnicki; AKA Dr Karl.

I'm a senior computer programmer/developer, so I have to say: not what I know about.