You can download Kathamitra( Hindi version of “Gospel of Sri Ramakrishna”) from these links.

The Hindi edition of Volume 2 of Sri Sri Ramakrishna Kathamrita.
The download link is here; Download PDF

The Hindi edition of Volume 3 of Sri Sri Ramakrishna Kathamrita.
The download link is here; Download PDF

The Hindi edition of Volume 4 of Sri Sri Ramakrishna Kathamrita.
The download link is here; Download PDF

The Hindi edition of Volume 5 of Sri Sri Ramakrishna Kathamrita.
The download link is here; Download PDF