Ringworld
Ringworld is considered a classic in the science fiction canon. It’s rich with concepts, quickly paced and absorbing.
The story is of Louis Wu, a 200 year old human, who is getting bored with the lack of novelty in his life. Hijacked on his birthday by a member of the secretive alien race known as the Pierson Puppeteers he is offered a place on an expedition with no more explanation than a look at a picture of of a star with a ring around it and the offer of plans to a new incredibly fast spacecraft. Taking the opportunity the Puppeteer, Nessus, builds up a team consisting of a member of the feline, warlike, alien race known as the Kzinti and another human the bred for luckiness Teela Brown.
Via an excursion to the rather odd Puppeteer homeworld this motley crew head on to what the now know to be the Ringworld, a gigantic artefact with the land area of hundreds of planets, the product of an unknown and incredibly powerful alien race.
While it’s quite mindblowing in concepts, the book falls down in terms of characterization and the plot falls apart in the last third destroying the momentum built up.
Definitely worth reading at least once if you have any interest in science fiction, it really doesn’t suit a re-read (as this was for me).