Groot

Guardians of the Galaxy: Rocket Raccoon and Groot (HC): Steal the Galaxy! Prose Novel (2014)
Groot (2015-2016)

Rocket Raccon and Groot (2016)

Rocket Raccon and Groot: Stranded on Planet Strip Mall Prose Novel (2016)

Rocket Raccon and Groot: Keep on Truckin' Prose Novel (2017)

Night, Night Groot (Picture Book) (2017)

I am Groot (2017)

Reprints:

True Believers: Kirby 100th - Groot (2017)

See also:
Groot as a member of the Guardians of the Galaxy