Social networks is easily the best, and cheapest, way to disseminate information about your Guide. If used effectively, you can build an audience for your Guide quite quickly.
Using social networks to promote your work isn't a traditional broadcast-type of communication. Instead, you can build real relationships with your readers, reach out to media experts, and include both sets of followers in your decision making process.
In all cases, your goal should be to foster relationships, while creating buzz for your Guide. Leverage users on existing networks, and convert them into readers of your Guide.
It's important to remember that none of these examples will provide much growth on their own; however, if you promote each of these platforms and keep driving interested people to your networks, your reach will grow over time. Each one of these content marketing tools can be used to continuously re-engage readers on a variety of platforms.