user70519: I am trying to write a multiple currency hd wallet.
I am using javascript libraries but I feel unsafe as I am new to most cryptography concepts and terms like elliptic curve, seeds, entropy etc.
I can not be a cryptography expert but I want to learn terms and concepts at least to know what it is doing when I am using third party libraries.
Can you recommend any books or online resources? 

user74555: Mastering Bitcoin is an amazing book that'll definitely get you started. It's freely available online here: http://chimera.labs.oreilly.com/books/1234000001802/index.html

70519: <p>I am trying to write a multiple currency hd wallet.
I am using javascript libraries but I feel unsafe as I am new to most cryptography concepts and terms like elliptic curve, seeds, entropy etc.</p>

<p>I can not be a cryptography expert but I want to learn terms and concepts at least to know what it is doing when I am using third party libraries.</p>

<p>Can you recommend any books or online resources? </p>
 74555: <p>Mastering Bitcoin is an amazing book that'll definitely get you started. It's freely available online here: <a href="http://chimera.labs.oreilly.com/books/1234000001802/index.html" rel="nofollow noreferrer">http://chimera.labs.oreilly.com/books/1234000001802/index.html</a></p>
