The Proposal
by Katherine Applegate · 1999
Popularity 18
The fact that his mother has been infested by an alien parasite and his father is planning to remarry puts Marco under such stress that he begins to morph into bizarre creatures that he is afraid will attract the attention of the Yeerks.
Extraterrestrial beingsJuvenile fictionFictionScience fictionMetamorphosisLoveLove storiesChildren's fictionAnimorphs (fictitious characters), fictionExtraterrestrial beings, fictionseries:AnimorphscollectionID:Animorphs