The poems are posted at my site | LiveJournal | Dreamwidth; the books they appear in are as follows:

ANSWERS:

a. Dragonsinger, by Anne McCaffrey
b. Someone pointed out that this version is actually The Hobbit; the LOTR version begins, “The road goes ever on and on”
c. The Dark is Rising, by Susan Cooper, and probably also in Over Sea, Under Stone and The Grey King in that series.
d. War For the Oaks, by Emma Bull
e. The House of Arden, by E. Nesbit
f. Puck of Pook’s Hill, by Rudyard Kipling
g. Silverlock, by John Myers Myers
h. Mentioned in Rilla of Ingleside, but the full poem appears in The Blythes are Quoted, both by L.M. Montgomery
i. The Lion, the Witch, and the Wardrobe, by C.S. Lewis
j. Harry Potter and the Order of the Phoenix, Harry Potter and The Deathly Hallows, by J.K. Rowling
k. John the Balladeer, by Manly Wade Wellman
l. The Little White Horse, by Elizabeth Goudge
m. Little Women (or Good Wives, depending how your book was published) by Louisa May Alcott
n. A Switftly Tilting Planet, by Madeleine L’Engle
o. Rewards and Fairies, by Rudyard Kipling
p. The Great and Terrible Quest, by Margaret Lovett
q. Appears in The Last Hero and forms the basis of the next series, The Heroes of Olympus, all by Rick Riordan
r. “The Girl With the Stair in Her Hair,” poem by Amal el-Mohtar, in Welcome to Bordertown. Beautifully put to music and sung by Amal’s sister and her fiance, here.

Oddly, I don’t think anyone spotted (k), the John the Balladeer one (either I should have used the one about Evadare, or y’all need to go read Manly Wade Wellman, because he wrote great stuff). No one identified (q) precisely, though Rose Lemberg spotted that it was a Percy Jackson book. And (p), The Great and Terrible Quest, was identified only in my x-post to Ravelry. That one is a bit obscure, though, and is forever being asked about on LJ’s whatwasthatbook community. It deserves to be better known – it has much the same flavor as a bunch of Lloyd Alexander’s books.