These two books are 2 and 3 of the Dragonriders of Pern series. They follow the first book about Pern, Dragonflight.
Dragonquest is a bit heavy on politics and lght on relationships. The issues between the Oldtimers and the Contemporary Dragon riders is mirrored by the the issues with the Older Land holders against the Dragon Riders. Life has changed in 400 turns and society has not remained static. Being accustomed to subservience, the dragon riders who came from the past demand higher percentages of tithe and crave a living that the holders aren't willing to provide. From that portentous start the story builds in intensity.
The White Dragon is my favorite of the series. As the white dragonrider, Jaxom is quite central to the storyline. I think I prefer the Pern books that revolve around a main charactor, rather than a political issue. However, as this book is written a few years after the first two, Anne McCaffrey wrote the first two books of the Harper Hall Trilogy in the interim. I would definately recommend first time readers to read Dragonsong and Dragonsinger before reading The White Dragon. Readers unfamiliar with the overall Pern Series will miss out on the charactor development of some pivital Harpers without the pair of books.Then one can followup The White Dragon with the 3rd of the Harper Hall series, Dragondrums.
Now if I can just locate the Harper Hall 1 and 2, because I already have #3.
Until next time...