Sort:  

Nice video.
This and this book are very good i.m.h.o.

I don't know if you read them already or even if your interested, just thought I let you know. :)

Coin Marketplace

STEEM 0.26
TRX 0.20
JST 0.038
BTC 96591.19
ETH 3584.60
USDT 1.00
SBD 3.76