'O is for Out of This World' (where the story takes place) - The Martian by Andy Weir. Astronaut is accidentally left behind after a manned trip to Mars. Very exciting survival story that is being made into a movie.
A is for April (the month in which you read the book)
B is for Bathing Suit (this book takes place at least partly in hot weather months)
C is for Children (Children's book or a book about children)
D is for Doctor (one of the characters) - Seven by Adrienne Wilder. Has a particularly evil Doctor as the bad guy.
E is for Ever (in the title)
F is for Family (book is about a family or family relationships)
G is for Geography (the story takes place in at least two different countries)
H is for Heart (it's a love story)
I is for Ice (the setting is cold - snow, ice, rain)
J is for Jokes (the book is humorous) - The Grendel Affair by Lisa Shearin. Very goofy heroine.
K is for Keyboard (at least one character plays a musical instrument)
L is for Lamp (the book takes place before electricity was discovered)
M is for Mother (one of the characters) - Cress by Marissa Meyer. Evil mother figures abound.
N is for New-to-you author
'O is for Out of This World' (where the story takes place) - The Martian by Andy Weir. Astronaut is accidentally left behind after a manned trip to Mars.
P is for Pilgrims (the story involves moving someplace new)
Q is for Question Mark in the title
R is for Random (close your eyes and pick a book at random from shelves or ereader)
S is for Sequel (the next book in a series you've already read)
T is for Time (the book travels time, moves through time quickly or flashes back)
U is for Urban (set in a city)
V is for Veteran (at least one character is/was a member of a military force)
W is for Wings (Book features Angels, Birds, Dragons or anything with wings)
X is for XXIV (it's the 24th book you read this year) - Mark Cooper Versus America by Lisa Henry and J.A. Rock. An Aussie boy struggles with the American fraternity system.
Y is Year (a book published this year)
Z is for Zoo (there is an animal on the cover)