I wanna start reading a book series. Anyone has good suggestions which one to read?

Patrick OBrian’s Aubrey/Maturin series.
Trust me. The gold standard.

 

The Witcher! You'll never read anything better.

 

My avatar and username are the second main character, truly my favourite fictional character ever created. If you're into high fantasy, with a realistic twist, I highly encourage you to give it a go! The 4th book, Time of Contempt, and the 7th, Lady of the Lake (as well as the prequel, Season of Storms) are my favourites. The first two books are collections of novellas.

 

The first book is The Last Wish, but as I said, it's a collection of novellas. The second book, Sword of Destiny, is also a collection of novellas; it starts being full books with the third, Blood of Elves. I highly suggest you start with The Last Wish tbh! And that you read it in order

 

Haven't read them. No too much sexual content?

 

It is indeed extremely sexual when I think about, wouldn't advise it for everybody, but if you can stomach it... Literally the first page of the first book is fantasised sex lol.

 

I've been reading a medieval fantasy series called The Riyria Revelations and it was great. It's quite safe to read for younger persons and has comparatively easy English. Noble people, love, war, family, religion are some main of the main themes of it. If you want to read, start from Theft of Swords volume.

Edit: Just read through your post. It's not like those complex books (like the ones @AtomicTango read) but I don't think it's childish at all. It's somewhere in the middle. In terms of being inspiring, not sure what works for you. I guess it's more entertaining and fun to read than being inspiring.

 

That's totally fair enough, especially on that website. But at least, it's a very adult recommendation!

 

It’s a series of books about a Royal Navy captain during the Napoleonic times.

It’s the basis for the movie “Master and Commander.” Excellent movie. Brilliant novels.

 

Try asimov's foundation series or GRR martin(even tough it will likely never be finished) or the witcher as has been suggested, i do not recommend non-fiction self-improvement books, to me they pretty much all say the same thing, if you are going to be reading non-fiction might as well read something that will enhance your knowledge such as psychology, biology, anthropology or such. You showed an interest in history in an earlier post you might consider reading some history books too, i know in school most people do not care but great historical figures are an inspiration much better than those self-help book imo.
There is also the gone series by michael grant i think it is right up your alley, it is sort of lord of the flies but in a more modern setting.