Food of the Gods by HG Wells
Gadsby by Ernest Vincent Wright
Longest English-language novel which doesn’t contain the letter “e”.
H - The Husband (Dean Koontz)
I - If You Were Here (Alafair Burke)
J - Julia (Peter Straub)
Kept in the Dark by Anthony Trollope
L - Little Women (Louisa May Alcott)
M is for Malice (Sue Grafton, Kinsey Milhone series)
N - Night Watch (Terry Pratchett)
O Pioneers by Willa Cather
P - The Pen is Mightier, by Andy Crawford (also known as iiandyiiii) 
Q - Queenie Peavy [Robert Burch]
Romola by George Eliot
S - Stalking the Nightmare (Harlan Ellison)
T - Tricky Twenty-Two (Janet Evanovich)
U - Ulysses (James Joyce)
V - Varney the Vampire by James Malcolm Rymer and Thomas Peckett Prest.
W - War and Peace (Leo Tolstoy)
X- The X-Ray Picture Book of Big Buildings of the Ancient World (Joanne Jessop and David Saliriya)
Y - You’re Never Weird on the Internet (Almost): A Memoir (Felicia Day)