The Literary Entrepreneur's Toolkit–Building and Managing an Online Presence for Authors is a resource I'll be consulting regularly.
This book is a must read for anyone who wants to build and maintain an online presence. It covers important subjects such as branding, finding readers, and building a community, plus it explains the various social networks, how they differ, tips for using each platform and how writers can use them to their advantage. There are links to 'follow worthy' individuals/influencers for each network, also links to resources such as web hosting, trailer making, audio platforms, file storage, video editing and a host of other cool tools.
I've been using The Literary Entrepreneur's Toolkit as a kind of refresher course on must-dos and don'ts, and gathering ideas for my own marketing and promotion. I'm glad I purchased this book and would recommend it for every writer who is struggling with establishing their presence online.