My publisher Addison-Wesley made a few more excerpts from my book The Tao of Network Security Monitoring: Beyond Intrusion Detection available online. The 48-page file bejtlich_chs.pdf contains chapter 2, "What is NSM?" and the previously announced chapter 10, "NSM with Sguil." You can also read Ron Gula's foreword or peruse the 34-page index in .pdf form.
Currently the Addison-Wesley site lists 16 July as the availability date for the book. Amazon.com shows 1 July, which is wrong, while Barnes and Noble shows 28 July. The actual release date should be sometime next week or the week after.