Alien Clones From Outer Space: Two heads Are Better Than One by H.B. Homzie
Barton and Nancy Jamison are just regular kids. That is until alien clones land in their hometown of Pine Bluff. Now there are two Barts and two Nancys! BUT (and this is a really big butt) the alien clones, Beta and Gamma, have a totally wacky take on Earth life. Whenever they're around, something always gets messed up.