Probably already discussed but it bears mentioning again.
Hopefully everyone already knows about the Logos site google searches (adding the search word/phrase):
site:logos.com (searches logos.com, the blog, forum, etc)
site:community.logos.com (searches only the forum)
And then adding arguments specific arguments (plus whatever search word/phrase is desire)
site:logos.com "Look inside" (searches the samples in Logos.com .... especially if the TOCs are available)
site:community.logos.com docx (looks inside the downloadable files you can put in a Logos5 Personal Book)
No doubt there's many other ones specific to your interests. There's not much Google doesn't search! I hadn't thought much about the DOCX files until I was looking for Sanscrit/Greek. Logos.com doesn't appear to be a major sanscrit retailer.