Here is some general information about books in Lithuanian language.
If you're interested in reading the book, I suggest trying to find it on online bookstores or libraries that offer e-book versions. You can also try searching for similar titles or authors that may offer free or paid downloads.
"Knyga Sielu Keliones" is a book written by Vilis Gortnertas, however I could not verify information about the book being available in PDF format.
Lithuania has a rich literary tradition, and many books are published in the Lithuanian language. If you're interested in reading books in Lithuanian, you can try searching for online bookstores or libraries that offer e-book versions.