Logos' Wiki page with instructions on adding personal books to Logos:
https://wiki.logos.com/Personal_Books
Scroll about halfway down to find the instructions.
Idea came to me from this site, Aréopage (French language site; with some English translations of content), in this article:
https://www.areopage.net/Logos5FreeModulesLibrary.html. There are some Bibles and Biblical Studies books here (author-created and public domain) which are formatted for use in Logos. These were done to use in Logos 6 but should work fine in the current version.
Unlike Olive Tree, which has a free Hebrew Tanakh module (I believe it's from WLC), Logos makes you pay to get one. It doesn't provide a free Septuagint either, although it does have a free Koine NT (SBL). My budget only occasionally permits buying modules, so any useful free ones are a blessing. I'm using the free edition of Logos 8, which works fine for me and will run the paid modules as well as the free ones.
I had already been used to working with WLC in Olive Tree, which has a nice clear font and is easy to use. For Logos, I first started putting in the Hebrew Tanakh modules from the Biblia Mirecurensia (
https://biblia-mirecurensia.com/en/text-downloads.html), an unpointed, emended version of the MT with modern punctuation and topic headings. The notes on the emendations (which are partly based on those done by the New English Bible, published in a separate volume for study) are available for download there also. Both the Hebrew Bible files on BM and the emendation files are already available in Word format. The same site also has free Septuagint texts in Word format. Both will work in Logos. So I thought it would be nice to have the two Hebrew Bibles to use in Logos, to compare side by side. At Chris's site you can get WLC either pointed or unpointed, and also the morphology files.
Chris can speak more to the benefit question, I am sure. It is a benefit for me since I can''t afford the BHS and BHQ mods for Logos. This way, I can have a pointed Tanakh in Logos as well as the unpointed one, Biblia Mirecurensia, I already had started putting in Logos. (I've only had time to add the Torah files so far, with the Prophets and Writings to come later. So also with the Septuagint files). One downside to be aware of, in the case of a personal book Bible set like this, Logos will only allow you to add the Bible texts one book at a time. Not the whole Tanakh in one file. So, it will take more time to get it into Logos, but it functions beautifully. It just has to be formatted in Word so a table of contents is generated. Logos' Wiki shows how to use Styles in Word to generate a TOC here:
https://wiki.logos.com/Adding_TOC_in_PBs.
I may try that out with some of my own documents at some point. Hope this info helps!