right now :

The dragon reborn by robert Jordan (3rd book in the Wheel of Time series)
The science of God by John Lennox
Name of the Wind by patrick rothfuss

do you like sci-fi or fantasy?

if you like fantasy or even if you don't, one of the greatest book series i've ever read is the Song of Ice and Fire. George RR Martin. the first book is a Game of Thrones.