Which book do 你 like them together in the most?

<3 them most in catching 火, 消防

Catching 火, 消防 ♥ and in the end of Mockingjay :))

Mockingjay because katniss doesn't finally fall in 爱情 with him til Tue end of it

Catching Fire. I like the part when they're on watch on the 海滩 and they were 接吻 and stuffs!

I loved katniss and peeta in catchingfire the most because they seemed really in 爱情 even though katniss technically wasn't in 爱情 with peeta. I just wish that the rebels would've saved peeta when they saved katniss.
<3 katniss and peeta 4 ever <3

Catching Fire, definitely.
In THG, Peeta was already in 爱情 with Katniss, but she was faking it almost all the time. And Mockingjay is too sad with the hijacking.
In Catching 火, 消防 though, Katniss begins to fall for Peeta for real, and we have scenes like her reaction to him nearly dying and the 海滩 scene.