1. The Winner's Curse by Marie Rutkoski contains an interesting world with a political war between the Valorians and the Herrani.
2. Trial by Fire by Josephine Angelini is historically magical with elements of science with parallel worlds of Salem.
3. Harry Potter series by J.K. Rowling is blend of the everyday Muggle world with an incredible magical world or witches, wizards and magical creatures. This is a series for all ages and is definitely a new classic.
4. Reckoning by Kerry Wilkinson contains a dystopian world centered around Silver Blackthorn and how she becomes an Offering for King Victor of Windsor.
5. Percy Jackson and the Olympians series by Rick Riordan contains world of humans, Gods and half-bloods. If you like Greek mythology and urban fantasy, definitely check out this series.
6. The Hunger Games series by Suzanne Collins contains a dystopian world where 12 districts cater to the Capitol until the mockingjay leads her people to an uprising. I love reading how each district and the Capitol differ from each other.
7. The Infernal Devices series by Cassandra Clare is a steampunk late 1800's Victorian-Era London series which involves shadowhunters, humans, demons, warlocks, etc.
9. Alice's Adventures in Wonderland by Lewis Carroll is about a fantasy world of Wonderland where Alice encounters many creatures and the King and Queen. Although a children's book, there is a lot of symbolism in the characters.
10. Stardust by Neil Gaiman is about Tristan on a search for a falling star and stumbles upon a mystical faerie realm of magic which is completely different from his English town of Wall.