The sub-title misleadingly suggests that anyone can apply the Zipline open-source backtesting library in Python to backtest market trading strategies. In my view one would need to be an expert Python coder and debugger to have a running chance of using Zipline to implement the concepts presented in this book. But, for those who want to develop the skills to do that, it is an interesting and rewarding challenge to undertake. This book at least provides a context and reference point to begin or progress that journey.