Polls for Our Souls discussion

SCI fi more and romance less please fkdksk

series is AMAZING space/aliens sci-fi, my absolute favorite (if you like YA)

Space Unicorn Blues & Five Unicorn Flush is one of my favourite sci-fi duos.

gives me Vanmpire academy vibes

Illuminae by Jay Kristoff & Amy Kaufman

Touched by an Alien by Gini Koch -scifi with a lot of action and humor and mild romance. It is a series though. They do go to different universes and travel in space, but that is a few books in.

Lightning
Recursion
11/22/63
(Note: I don't know if it bothers you, but these aren't YA books. 11/22/63 is the most explicit; I don't remember there being much too inappropriate in the others, but I may have overlooked it.)

The Gone World by Tom Sweterlitsch is a really good book, with a great female protagonist.
Dark Matter is by Blake Crouch, about interdimensional sci-fi, as is Recursion, but that is more about time travel.
The Walls of the Universe by Paul Melko is about a guy who goes from one alternate reality to another because of a device he has, really good.
Resonance by Chris Dolley is about a man who constantly travels between parallel universes, and I loved it.
Finity is about travel between parallel universes.
And as always, there is The Time Machine by H.G. Wells.

These all have more to do with science fiction than romance.

Psychology of time travel

Illuminae had a bit more romance than I like.

One Word Kill
Time Snatchers (YA)
Here and Now and Then
Dark Matter
Hollow World
SYLO (YA)

Good sci fi not necessarily with time travel but little to no romance:
Ender's Game
Terminal Alliance
Old Man's War
Skyward
Six Wakes
Unforgettable

Time travel, no romance:
Doomsday Book, by Connie Willis, and
time travel, a little romance:
To Say Nothing of the Dog, by Connie Willis

Good sci fi, minimal romance:
The Gate to Women's Country, by Sheri S. Tepper
The Terrorists of Irustan, by Louise Marley
Vicious, by V. E. Schwab
Defy the Stars, by Claudia Gray
A Darker Shade of Magic, by V. E. Schwab

Good sci fi, some romance:
Adaptation, by Malinda Lo

Simon R Green has several series. His Druid series has mild romance, but it's definitely more about the action and magic. Jim Butcher is good also. He has a fantasy series as well as SciFi /UF.