Children of Time by Adrian Tchaikovsky has a terraforming aspect. If I recall correctly it focuses more on evolution than on the process of terraforming a planet. So it may not be exactly what you're looking for. It was an interesting read, though.
https://www.goodreads.com/book/show/...ildren-of-time
There is a sequel to the book (Children of Ruin) which I have not yet read.