minor wordsmith

content/index.md

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 ## Why this book? 
 
 This book focuses on the _practical side_ of network science — **working with
-network data** — to provide a more practical guide for data scientists to use network science.
+network data** — to offer a useful guide for data scientists to use network science.
 
 We hope that this book can help researchers in day-to-day tasks, starting from
 the very act of conceptualizing networks through to sophisticated network