Shubham one can also send basic books like -
Jinsarasvati which is a basic book containing all aspects of Jainism in small detail and is written by Muni shri prashantsagarji who is a shishya of Acharya shri vidyasagarji maharaj.
One can also read Prasnottar Ratnamalika but that book concerns more about how one should behave in worldly life but other than that offers nothing in depth about Jain scientific concepts.
I will send you the pdf of both of them in high quality form if you like.