Alvin and Eddy shared some stamps. Rachel has 2/9 of the total stickers. If Serene has 42 stickers, how many stamps do they have altogether?

not enough information.
Did you switch names?
Where do Alvin and Eddy come in?

I apologize for the confusion. It seems there may be missing or inconsistent information in the question provided. Without the specific details of how the stamps are related to the stickers, it is difficult to determine the total number of stamps Alvin, Eddy, Rachel, and Serene have altogether. Could you please provide more information or clarify the question?