user6949: Please find reference for the texts: 
https://en.wikipedia.org/wiki/Gandhāran_Buddhist_texts

user-1: Like these ones?

https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dstripbooks&field-keywords=Gandhari
https://www.thriftbooks.com/a/richard-salomon/877720
http://www.rhinoresourcecenter.com/pdf_files/138/1386654811.pdf

Amazon lists 3 pages of books. I didn't check all three pages though.
But it should be enough to get you started.
Have fun. :)

6949: <p>Please find reference for the texts: 
<a href="https://en.wikipedia.org/wiki/Gandh%C4%81ran_Buddhist_texts" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Gandhāran_Buddhist_texts</a></p>
 -1: <p>Like these ones?</p>

<ul>
<li><a href="https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dstripbooks&amp;field-keywords=Gandhari" rel="nofollow noreferrer">https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dstripbooks&amp;field-keywords=Gandhari</a></li>
<li><a href="https://www.thriftbooks.com/a/richard-salomon/877720" rel="nofollow noreferrer">https://www.thriftbooks.com/a/richard-salomon/877720</a></li>
<li><a href="http://www.rhinoresourcecenter.com/pdf_files/138/1386654811.pdf" rel="nofollow noreferrer">http://www.rhinoresourcecenter.com/pdf_files/138/1386654811.pdf</a></li>
</ul>

<p>Amazon lists 3 pages of books. I didn't check all three pages though.
But it should be enough to get you started.</p>

<p>Have fun. :)</p>
