I'll contrast with others and say that, unless it adds content, an e-book won't be more useful than organizing links around methods and measurement, which are great posts.
For additional content to make an e-book more worthwhile, perhaps providing more code or detailed examples (e.g. for random assignment techniques, MHT adjustments, survey questions etc.). That level of detail may be too much for a blog post but ideal for an e-book.
Other aspects I like: summaries of papers and conference highlights and tips about conducting field work (e.g. implementation, measurement, random assignment)--particularly around overcoming challenges. These are great insights to draw on.
Great blog. Thanks and congratulations!