Out of all the books Bibliophile mentioned, I've only read the Fault In Our Stars. It was okay, I didn't love it. I WANT to read The Lunar Chronicles, though. I have a couple of suggestions as well:

I Am Number Four series (LOTS of swearing, some romance, some violence)

Artemis Fowl series AKA my favorite book in the world (hardly any swearing, like no romance whatsoever, and not much violence.)

CHERUB series (some violence, lots of swearing, and lots of kissing)

Alex Rider series (a TINY bit of swearing, almost no kissing, and a decent amount of violence)

All of these books were REALLY good, though. The I Am Number Four series is one of my favorites, but it has a RIDICULOUS amount of cursing in it, so be warned. 

Young Adult Books. Ughhhhhhhhhhhhhhhhhhhhh.

I totally agree with SE and Ethstelle. It is SO hard to find a worthwhile book these days that isn't too young and isn't entirely devoted to romance. Take Divergent, for example- it started out great, I was actually enjoying it- and then the nice, well-done plot was completely drenched in sappy romance that made me slam the book shut and telepathically yell, "NOPE!!!!! I'm am not reading this anymore." I am starting to think the label, 'Young Adult' is just another name for the stereotypical teenager. Like I said, ughhh. 

But every once in a while, there are some good ones. They are much harder to find, but-

Lockwood & Co. ~ This is one of my favorite, favorite series of all time. It has absolutely no romance in it (yet, as the author is still writing) and no cussing. Then why, you may ask, would it be classified as YA? Well...*grins evilly* lets just say, if you are highly suseptable to horror stories, you should not read these books. They are guaranteed to creep you out (in a good way). But, in addition to horror, they also have amazing characters, multi-threaded plots, excruciating cliff-hangers, and humor. I highly recommend them.  

Ghost Hawk ~ An amazing novel by Susan Cooper that is part fantasy and part historical fiction. It has minimal romance and no cussing. I generally think of it as an older book, just because the writing style is geared for older people. It is also a very strange story- but I can't say more, because that would spoil it. READ IT! 

I hope these fulfill your priorities, Cho. :) 

Ohhhh, man, I'm really behind on YA? I used to read it a ton back in 2014, but now that I"m attempting to read every classic ever for some...reason..., I've kind of fallen behind. First, thoughts on books I've read here - 

I've read The Fault in Our Stars, because everybody and their mother's read The Fault in Our Stars. I thought it was good, from what I can remember! The Book Thief, of course, made an enormous impression on me - I read it in eigth grade, same as TFioS, and wow was the language in that book utterly brilliant. And...that exhausts the ones I've read, aside from all of the John Green ones because, yes, I had a John Green phase at age thirteen. I try not to remember it. 

Okay, on to recommendations!

- My two favorite YA books of all time are absolute masterpieces that changed my entire life, but I don't know if I'm even allowed to bring them up on here because A) both contain a great deal of what you guys referred to as 'kissing and swearing' and B) I don't even know how many people are okay with the people doing the kissing in these books. Moving on! 

- Everything Scott Westerfeld writes is excellent - his Leviathan series is very appropriate, with a very subtle, well-developed love story, only a bit of very tasteful kissing, and swearing mostly consisting of Quirky Fantasy Swears like 'barking spiders!" and swearing in German because apparently that's a theme. More importantly - gosh is it the best YA I've ever read. It's a steampunk alt-history World War One novel with hugely memorable characters, adventures, and incredible illustrations. All in all: such a well-thought-out, gorgeous, memorable series. 

- Not sure if His Dark Materials counts as YA, and I haven't read the last book, but gosh is it incredible - it's helped define everything I love about fantasy fiction, and it's sort of culturally defining. Wouldn't recommend if your're a strong Christian, though, because in many cases they can find the books upsetting - which I'm not saying as a condemnation of either side, of course. 

- Legend by Marie Lu also has the problem of me having not finished the last book, but it's a YA dystopia that definitely stood out to me in terms of creativity and memorability. Can't remember much about appropriateness, but the romance was practical and non-annoying, so that's already a plus? 

- The Raven Cycle by Maggie Stiefvater - also haven't read the last book, which just came out, but very clever with very memorable characters; one of very few YA books I've read and finished in the past year. Beautifully atmospheric; lots of swearing, but not a lot of kissing, considering the premise is that if the main character kisses her true love, he'll die. Not really romance-focused; it comes more as a sideline. 

Aaaaand that's kind of all I have? It was kind of narrowed down by me worrying about what kind of content you guys are interested in? 

I think it's unproductive to think that the YA genre is inherently terrible or boring or contains too much kissing; some of my favorite books ever are. YA. On the other hand, some of the least memorable books I've ever read are YA too, but that doesn't mean anything, y'know? It can apply to any genre of fiction. The classics are filtered out by time, with only the best and most genre-defining remaining, and nobody even likes all the classics - I loved Gatsby, loved Les Mis, and then hated Brave New World with a burning passion. And that's because if they were released at the same time, none of them would really fit under a single genre, y'know? YA doesn't refer to a specific set of genres; it refers to a target audience, and common threads can be found in it because of marketers who think they know what whoever 'young adult audiences' are want to read. 

Maybe that's because I'm not disillusioned by romance at all, though. At least, certain kinds of romance.  

Legend! Yes! I literally just found out that Legend was a series a few weeks ago. Yay!

I don't have anything new to add, but 

I'm in fandom.

B| Nothing scares me anymore. (Also, I love The Fault In Our Stars and want to read Paper Towns.)

How about books by Jack London? Mild swearing, a bit of violence, and complicated reading but awesome!

Captch a said ubhf. You behave? Was that a threat?

Not sure if either really classify as "young adult novels", but they're great reads nonetheless.

1984 by George Orwell

Genre: Dystopia (no hormonal teenagers). 

What I would put on the back cover: A cautionary tale of a man named Winston living in a totalitarian society, in a world where what the all-seeeing government says, is.  After meeting a woman named Julia, Winston begins to investigate rumors of a rebellion. But betrayal awaits him at every turn...  

1984 is a terrifying vision of the world that is hard to put down. Everything about the book lingers, especially the ending.

Warnings: Small amount of language, though the worst cuss in the book is censored, mature themes, violence, political themes.  

The Origami Yoda series by Tom Angleberger 

(Consists of six books: The Strange Case of Origami Yoda, Darth Paper Strikes Back, The Secret of the Fortune Wookie, The Surprise Attack of Jabba the Puppet, Princess Labelmaker to the Rescue, and Emperor Pickletine Rides the Bus, as well as bonus books on origami and drawing)  

Genre: Middle school realistic fiction/fantasy(?). 

What I would put on the back cover: A series of several 6th (and from the second book onward, 7th) grade Star Wars fans trying to survive middle schoool! Starting out simply with the cast of Tommy, Harvey, Kellen and Dwight, ither characters soon have growing influence throughout the series. Written in a format of "case files" on their various escapades and illustrated by Kellen's dooles in the margins, everything starts when Dwight brings an Origami Yoda to school... that gives surprisingly profound advice... 

A story written crackling with voice, with all the cadences of middle school speech-- not always with proper grammar!-- that will have you laughing the whole way through. Beautiful character development occurs throughout the series. A must-read for anyone-- especially middle-school-age Star Wars fans!  

Warnings: Very mild romance (nothing more than things like "we kissed in front of the meerkats" but by the end of the series there are a LOT of relationships mentioned), often followed by Kellen calling it "gross",  things like "Oh bantha dung!" but no real swearing, Star Wars references, actually quite kid-friendly but enjoyable for any age. 

Wow, that was long... I really should learn to shut up!  

I'm re-reading The Book Theif.

I'm in complete and utter awe. 

I LOVE the Lunar Chronicles. I'm happy to see fellow Lunartics on this thread!

To Jarvis: I'm also obssessed with Lockwood and Co if you want to talk.