The Loneliest Girl in the Universe by Lauren James
Can you fall in love with someone you’ve never met, never even spoken to – someone who is light years away?
Romy Silvers is the only surviving crew-member of a spaceship travelling to a new planet, on a mission to establish a second home for humanity amongst the stars. Alone in space, she is the loneliest girl in the universe until she hears about a new ship which has launched from Earth – with a single passenger on board. A boy called J.
Their only communication with each other is via email – and due to the distance between them, their messages take months to transmit across space. And yet Romy finds herself falling in love.
But what does Romy really know about J? And what do the mysterious messages which have started arriving from Earth really mean?
Sometimes, there’s something worse than being alone . . .
Rating: 
Romy is very very lonely, and it is interesting to try to figure out exactly why she ended up being so alone (that is one part of the story in itself). Which as much as sometimes I want to be left alone I do not want it that bad.
Then she starts receiving messages from someone called J in the new ship and she starts to get slightly confused by it. But there are also some other messages coming to her and she has to figure things out.
I have to admit I quickly knew or guessed the “twist” but it was still good and very well done. Romy was awesome and it showed well her lack of company and just how lonely she was and the way hope changes her at times. The writing flows as you read so you want to keep reading, trying to find out what exactly is going to happen and when.
Moon recommends
Of course, The Loneliest Girl in the Universe. If you like space themed books, then Elizabeth Moon’s are a good choice, or you can try Becky Chambers’ Wayfarers books.