I have been downloading books from obooko for 7 years and have enjoyed every one. Quality books! I have contacted the team there on a few occasions and have received a personal reply within a couple of hours, Great service... especially as everything is free of charge. Based in the UK or USA, not sure. You have to register but I think this is to ensure you are over 13. I have never received any spam emails from them, only confirmation of my login details.