Egg Monsters from Mars

Egg Monsters was the forty-second book in the Goosebumps book series. It was written by R.L. Stine. It was preceded by Bad Hare Day and followed by The Beast from the East.

The cover illustration consisted of a chunky evil mess, that hatched out of a green egg. It's in a kitchen and oozing over normal eggs in an egg carton. The tagline on the front cover was, They're no yolk!

It was released in April 1996 and was 115 pages long.

Plot
Brandy, Dana's little sister, is having her birthday coming up a week before Easter. She cons her parents into setting up an egg hunt for her birthday, but during the party, an egg fight ensues and the party becomes a disaster. During the egg hunt, Dana finds a strange, large, pale green egg, which does not break when it is thrown by Dana's best friend Anne, much to Dana's amazement.

About a day after the egg disaster, the huge green egg hatches and out comes an "egg monster" that resembles a pile of rotten scrambled eggs with eyes.

Dana places the creature in a shoe box and bikes over to Anne's house to show it to her. Anne's mother is disgusted by the thing and nearly washes it down the drain, but it is saved by Dana. He later brings it to Dr. Gray's lab. Dr. Gray explains that the eggs came down from Mars in a shower that only hit the town. Dana's egg was the last one.

Dr. Gray locks both Dana and the egg creature in a room with frigid temperatures - and the room contains many more egg creatures. He wants to keep Dana to experiment on him because of Dana's contact with the creature. Dana's father does not discover that he is there.

After a few hours, the egg creatures merge together to form a blanket for Dana so he does not freeze to death. Eventually, the creatures overpower Dr. Gray and Dana gets out of the room and runs back home But when he comes back to the lab to show his parents the egg monsters, both the egg monsters and the notorious Dr. Gray are gone, and his parents don't believe him....

Surprise Ending
The next morning he seems to be fine and begins to go to his friend Anne's house, when he suddenly crouches on the lawn and lays an enormous egg.

Trivia

 * The cover makes it seem like the egg creatures are really monsters. But in the book they're actually a benevolent force captured by a mad scientist.