Each book has its own copyright information.
No it would be copyright theft. The author did not give permission for her work to be free.
Animorphs was created in 1996.
The ISBN of The Hidden - Animorphs - is 0439106788.
The Sacrifice - Animorphs - was created in 2001.
The ISBN of The Experiment - Animorphs - is 0590762613.
The Unexpected - Animorphs - was created in 2000-07.
The Unexpected - Animorphs - has 143 pages.
The Separation - Animorphs - has 158 pages.
The Separation - Animorphs - was created in 1999-07.
The Mutation - Animorphs - was created in 1999-11.
The Mutation - Animorphs - has 142 pages.
The Resistance - Animorphs - was created in 202000-10.