Adoption was a and is a common practice Western socities for various reasons: a married couple are unable to give birth to a children medically and have either to adopt costly IVF procedure or adopt children from Asian countries. In India there are some NGO which deal with this on a commercial scale.
Adoption in India is for medical and for other reasons like adopting child of a brother/sister into another brother/sister's family.
How to see adoption astrologically both for the child adopted and the parents adopting the child has been a matter of deep research in modern times.
The author of this book Rajbir Singh answers this question comprehensively and scientifically in this long awaited research of his with soundly tested astrological principles and convincing practical illustrations.