Reddit reviews Universe: The Definitive Visual Guide

Campbells: BIOLOGY 6.9lbs

https://www.amazon.com/Campbell-Biology-10th-Jane-Reece/dp/0321775651/ref=sr_1_1?s=books&ie=UTF8&qid=1485783159&sr=1-1&keywords=biology+textbook

Atlas of the Universe 5.8 lbs

https://www.amazon.com/Illustrated-Atlas-Universe-Tirion-Garlick/dp/1740893778/ref=sr_1_3?ie=UTF8&qid=1485782836&sr=8-3&keywords=Atlas+of+the+universe

Universe 5.1lbs

https://www.amazon.com/Universe-Robert-Dinwiddie/dp/0756698413/ref=sr_1_1?ie=UTF8&qid=1485782970&sr=8-1&keywords=Universe+book

The World of Ice and Fire 4 lbs

https://www.amazon.com/World-Ice-Fire-History-Westeros/dp/0553805444/ref=sr_1_1?ie=UTF8&qid=1485782797&sr=8-1&keywords=World+of+Ice+and+Fire

Elements of Ecology 3.2lbs

https://www.amazon.com/Elements-Ecology-6th-Thomas-Smith/dp/0805348301/ref=sr_1_1?s=books&ie=UTF8&qid=1485784000&sr=1-1&keywords=elements+of+ecology+6th+edition

Last Words of Notable People 3.2 lbs

https://www.amazon.com/Last-Words-Notable-People-Noteworthy/dp/0976532581/ref=sr_1_1?ie=UTF8&qid=1485782704&sr=8-1&keywords=last+words+of+notable+people

Illustrated Edition of Game of Thrones 3 lbs

https://www.amazon.com/Game-Thrones-Illustrated-Song-Fire/dp/0553808044/ref=sr_1_1?ie=UTF8&qid=1485782765&sr=8-1&keywords=illustrated+edition+game+of+thrones

These are the heaviest books off the top of my head, I'm not home so I can't look at my collection.

Moving my collection of books was not fun when we bought a house. I almost sold them all, but I'm glad I didn't. (I have like, over 1000)

> He also frequently talks about his love of space and his extreme desire to venture out there

There's this book, Packing for Mars: The Curious Science of Life in the Void, that has astronauts talk about how it actually is to be in space, it's filled with stories from engineers, researchers, some history of space flight and a ton of trivia. Your boyfriend might really like it and at $14 you can add other small gifts.

If he's more visual, he might also enjoy Universe by Martin Rees, a visual guide to the Universe - the pages are filled with pictures and interesting facts, everything we know about the Universe, very interesting and stunning to look at. Admittedly more expensive at $35 considering the high quality pictures.

Shameless self promotion coming right up too:

> Walking Dead [...] Comic Con

By any chance, he might like The Walking Dead Boardgame and you could both play together or with friends.

With video games, it all depends on what games he plays. Portal? This Portal 2 Desk Defender is very fun to play with and so is this Wheatley LED Flashlight. I'm not sure what else to suggest from your details, maybe it would give you a few ideas if you checked my SO and mine's website, introduce some details about him and see what gifts come up if they catch your eye.

I hope some things were useful!

The book is called "Universe", I bought mine when a local book store was going out of business, the star charts are outdated now but apparently there is an updated version that came out in 2012. After looking at the table of contents and some pages it looks very similar and has some nice things added, might have to pick it up myself.

https://www.amazon.com/dp/0756698413/ref=cm_sw_su_dp

I have a copy of this book, and it covers most aspects of astronomy at an intermediate level.

It's a bit expensive but it sounds like you're after something like the DK Smithsonian Universe

Universe. http://www.amazon.com/Universe-Robert-Dinwiddie/dp/0756698413