Another new book about Trains at Gutenberg.org. "Chatechism of the Locomotive" by Matthais Nance Forney and Georg Kosak. A very technical breakdown of a standard American Steam locomotive: https://www.gutenberg.org/ebooks/76379
Not a PDF, but as three types of EPUB files, two types of kindle, plain text or HTML. From most of those you may be able to convert one to a PDF. It is a little surprising they don't do PDF, but maybe it is a licensing thing.
Not a PDF, but as three types of EPUB files, two types of kindle, plain text or HTML. From most of those you may be able to convert one to a PDF. It is a little surprising they don't do PDF, but maybe it is a licensing thing.
Almost all ebook readers support the epub format and its files are tiny compared to pdf. I converted that in Calibre which is the king of ebook management and reader software. The patent on pdf file format ran out a few years ago. Anyone can write them now.
Edit: you can even click the Read Now button and use the pdf virtual printer in Windows to convert to a pdf and save it to your PC.