This list contains four novels per letter of the alphabet. To make it a more interesting and comprehensive list, each set of novels for each letter includes:
1) two novels written by female authors
2) two novels written by male authors
3) a classic novel (except for X & Z)
4) different authors for each novel in the list
My original list of one novel for each letter of the alphabet can be found here: https://www.listchallenges.com/an-alphabet-of-novels. Enjoy!