The Long Mars

I just finished the third of the long trilogy, the long Earth and now the long Mars

I thought the ending was too abrupt

I'm going through your recommendation from previous episodes, The Long Mars

I finally finished The Long Mars.

I felt that the ending was very abrupt and definitely open-ended

the third of the Long Earth series by the collaboration between Terry Pratchett and Stephen Baxter

I've gotten about halfway through it

I love the other two books.