we're just going to copypaste what we wrote in an earlier thread about book series but altering it slightly:

Temeraire Series, by Naomi Novik
Aka. Napoleonic wars... with dragons.

Deltora Quest series... serieses? (three series), by Emily Rodda,
Aka. our? Childhood?

Children of the Red King series, by Jenny Nimmo
Aka. talk about complicated family relations and magic abilities.

Dinotopia series, by James Gurney
Aka. Art??? So pretty????

Samurai Kids series, by Sandy Fussell
Aka. Disabled children training to be samurai? Yes?
I've only even read the first few, but it's good.

Moonshadow series, by Simon Higgins
Aka. Ninjas, dude. Also, far more supernatural stuff than I expected.

Discworld series, by Terry Pratchett
Aka. *long sad sigh*
Anyway, Pratchett definitely gets better at writing over time, and technically you can pick up any book at all and start reading, though there are different groups the books sort-of follow, so you have the Witches books, and the Rincewind Books, the Guards books etc.
(Mark Reads does read... throughs? Let's reads? of book series and has been working through the Discworld books in publishing order for like. several years now, if anyone wants to read but can't obtain)

The Gateway Trilogy, by Isobelle Carmody
Aka. I read the first book when I was in grade six, way back in the early 2000s and frankly if book 3, Firecats Dream, ever actually comes out I will be dumbfounded.
But Billy Thunder and the Night Gate (book1) and The Winter Door (book2) were good from what I remember.

The Silver Brumby, by Elyne Mitchell
Aka. I just like this book
Other books in the same universe are okay, but they just. Aren't the original book.

The Last Dragon Chronicles, by Chris d'Lacey
Clay dragons that are more real than they seem. There is Magic here...
but oh man, that series is a right trip after book 3. The last book is just... * small, soft "what the heckery?" * Honestly, the series could have ended at book three, as a trilogy, and that would have been fine. It doesn't and books 4-6 are a right trip and a half. Not... not bad necessarily, but boy do things get hard to keep track of.

Enchanted Forest Chronicles, by Patricia C. Wrede
Aka. A princess decides that all this forced princessing is silly and she doesn't want to get married like everyone else wants her to so she go finds a dragon to 'kidnap' her. Adventures in dragon politics, wizards, and knights ensue

exo, The winnowing, Blackthorn key series, Summer's end, OCDaniel, School for good and Evil (greatly recommended), Lunar chronicles, Hooked, Secrets series, and Everland series.
Try those if you haven' they are pretty good.

alright..

Sandman by Neil Gaiman (it's a comic but probably the most amazing thing ever)
Fablehaven series
Percy Jackson series
Asylum series
Speak by Laurie Anderson
Raft by S.A Bodeen
Lorien Legacies (I am Number Four) Series
Endgame series by Jame's Frey
any Stephen King book because..Stephen King.
Little women
Anne of Green Gables
Emily the Strange series\
Miss peregrin's home for peculiar children
The Peculiar (first book) the Whatnot (second book)
I have more if you need 'em. I read waaaaaay to much xD

Little Brother by Cory Doctorow (Fair warning, it is definitely meant for older teens and up)
Ungifted by Gordon Korman
Wonder by R.J. Palacio
The House of the Scorpion by Nancy Farmer
The Last Invisible Boy by Evan Kuhlman(this one is a definite tearjerker)
I'll add more if I think of some ^-^

So I'm not sure what reading level you're at or what sort of books you enjoy, so here's a couple of ones I like. I'm posting only stand-alone books since series books seem to have been covered quite well by earlier posters.

Timeline by Michael Crichton
I actually recommend pretty much anything by Michael Crichton but Timeline is the book that got me into reading him in the first place. It's a science fiction what-if time travel book set in a modern day and medieval times. It's a quick read once you get into it and Crichton makes the science portion easy to understand for a layman audience.
Michael Crichton is the writer of the Jurassic Park novel (that the movie is based on) and that too is definitely worth a read. I also recommend Sphere, Next, and Andromeda Strain as similar what-if science fiction stories of his. I'm also fond of Airframe and Rising Sun.

Wicked by Gregory Maguire
The Wizard of Oz from the Wicked Witch of the West's point of view, essentially. It follows the Witch's life from the time of her birth until her death at the hands of Dorothy. It inspired the hit Broadway musical of the same name. It's drastically different from the musical, though, and offers a dark and rough version of the colorful Oz that you may be used to.
Maguire has made a career off of rewriting fairy tale stories into darker versions of themselves including Mirror Mirror and Confessions of an Ugly Stepsister. Wicked itself also has 3 sequels that follow the (mostly) original characters after the death of the Wicked Witch. His writing CAN be a bit dense and difficult to follow at times, though, so be careful.

Hitchhiker's Guide to the Galaxy by Douglas Adams
One of the funniest books you are ever likely to read and also the source of numerous internet memes. In short, Earth is destroyed and very weird things happen to one of the few remaining earthlings in the galaxy. If you haven't read this before then do so at the earliest possible opportunity.

And Then There Were None by Agatha Christie
The best-selling mystery novel of all time by Agatha Christie, the best selling novelist of all time. She's outsold only by Shakespeare and the Bible. Ten strangers meet in a mansion on a private island. All seems fine, if a little odd, until people start to die.
If you like that book then Christie has plenty of others to choose from. I'm also fond of Murder on the Orient Express and The Secret Adversary.

The Day of the Triffids by John Wyndham
A post-apocalyptic science fiction novel where mankind has found a plant species known as triffids that can move around on their own and communicate with one another. They're tamed and bred by mankind until an odd meteor shower blinds anyone who watched it.
Unfortunately, the books seems to have fallen popularity for some reason since I cannot find many peers who have read it. It's a rather short read, though, and I definitely recommend it for any classic sci-fi fan.

Mogworld by Yahtzee Croshaw
Yahtzee is the writer and star of the video game review series, Zero Punctuation. He's written a couple books in his spare time that show his quirky and slightly odd sense of humor. It's the story of an NPC in an MMO (essentially World of Warcraft) who is resurrected as an undead by a Necromancer. He's forced to serve his Necromancer lord even though all he wants to do is die again (for good this time).

I highly recommend Brandon Sanderson's books as well as the Redwall series if you're looking for something with a bit of humor and a ton of action. Also, these books are pretty thick, so if you like reading as much as I do, they should keep you busy for at least a few days.

Hey, if you like ToG/ACoTaR, then I recommend the Six of Crows Duology by Leigh Bardugo ^^
She's also written Shadow and Bone series, but I've heard it's not as good as SoC (but they're both in the same universe)

I've never read them myself, but I also heard that Warcross/The Young Elites by Marie Lu are also good reads :)

_{On another note, am hyped for the last book of the ToG series, it's definitely dragged on enough lol
I even have a few Sylesti's named after some characters :)
Elide, Asterin, Aedion, Feyre, Rhys, Mor}

Yes, she really needs to finish ToG!!! Arggg, who is she going to kill? Please not Lysandra, Please, please not Lysandra.

I'd reccomend This Mortal Coil by Emily Sulvata

its got a lot of plot twists, adorkable characters, and a really neat plot about genetic technology and moral grey grounds

I am personally a huge fan of Elide, she's been through so much~

Will admit I'm not a massive fan of Aelin though, I much prefer the sassy, immature no freaks given Celaena that I fell in love with in the first book :P (my favourite part of EoS was the bit where she pretends to be Aelin again when meeting Rolfe)