“As Gregor Samsa awoke one morning from uneasy dreams he found himself transformed in his bed into a gigantic insect.”
This is the first phrase of Kafka's most famous short story "The Metamorphosis" and this is the character Google did choose to mark the author's 130th birthday.
"The Metamorphosis" is available at project Gutenberg and can be downloaded here. "The Trial" also available to download
Reading an author is the best way to celebrate him and this story is a good one to start reading Kafka who created so many masterpieces.