Your welcome, also you can go to archive.org aka the internet library and sign out the digital version of Ringworld or thousands of other books for free for 2 weeks and if not done just resign it out again. Tip, for me the print was to small so I hit F11 for browser full screen after increasing the size of the pages on the site and I could lean back and read with ease with my usb mouse and mousepad on my thigh so didn't have to sit up or lean forward to reduce eye strain. I'm just giving this tip since my neck was sore the first few books I read there and it was a pain clicking the mouse to change pages leaning forward and not just immersed in the story without thought.