I found a link to a library that has a lot of LHP type books in it. I can't speak to the quality of said books, but it's a library.
You can then put in an authors name and search like this. Just enter and name and the URL populates as below.
http://gen.lib.rus.ec/search.php?req=Damon+Brand&column%5B%5D=author
When the search returns results look on the right hand side for "Mirrors". Select 1,2,3,4,5. Then a new page opens just hit "GET" and it should download the PDF.
I like to use Amazon and search for books then come to this link and download from a free, public source. I'm sure other libraries may work too, this is just the best one I've found so far in regards to LHP material.
