Oh boy where to begin?? Well for starters to get it out of the way The Lord of the Rings is a must read for anyone, as is Starship troopers both are hallmarks of their respective genres made by men that pioneered their genres.
If you want male fantasy taken to the 11th degree then go read the Paladin of Shadows series by John Ringo (they make for a good audiobook listen as well), fans of this author know just how batshit this series can get but to his credit they are fun reads.
For a good fiction book, that is absolute gem in both book and even more as an audiobook I suggest Kitchen Confidential by Anthony Bourdain. The book that made him a household name, it is one of the best books about how gritty and insane the high end dining world can be. If you have ever worked in food or just curious to see how it compares to media adaptions like The Bear to name a show... I recommend it whole heartedly.
Audiobook wise: I say to look no further then the Red wall series by Brian Jacques (RIP), I believe for most of his books that made into audiobooks he had a full cast of VAs do the lines for all of the characters of the book and had musical scores added in for ambiance. They may have been made for kids but a lot of those books had mature topics like death, sacrifice, war, PTSD, famine, and genocide. Shit gets pretty brutal whenever the author isn't making absolute food porn with his descriptive takes on feasts and food in general.
For a good Mil Sci Fi series that is worth a listen, go for The Lost Fleet series by Jack Campbell. Some of the best mil stories ever written in my book especially if you like space battles that have nuance and a pinch of realism mixed in. I have read the whole the series and in the process of listening to it and it never disappoints with good suspense, political intrigue, PTSD, and war.
