Unlike Kwanzaa, Hanukkah enjoys no agreed-upon spelling in English. The most common variant is "Chanukah," reflecting the proper pronunciation of the opening consonant, which is like the "ch" in "Bach." The spelling employed in this article is from The Associated Press Stylebook and Libel Manual, Slate's guide in such matters.
If you'd like to know more about Kwanzaa, you can read The Complete Kwanzaa: Celebrating our Cultural Harvest, by Dorothy Winbush Riley; A Kwanzaa Keepsake: Celebrating the Holiday With New Traditions and Feasts, by Jessica B. Harris; or Merry Christmas, Baby: A Christmas and Kwanzaa Treasury, edited by Felix H. Liddell and Paula L. Woods. Karenga, Kwanzaa's creator, has also written two books on the celebration, Kwanzaa: Origin, Concepts, Practice and The African American Celebration of Kwanzaa: A Celebration of Family, Community & Culture. And Anna Day Wilde describes how the holiday gained popularity in "Mainstreaming Kwanzaa," in Public Interest, No. 119, Spring 1995.