World of Ptavvs by Larry Niven cover by Peter Andrew Jones
I read this as a teenager and thought it was great – always loved PAJ’s artwork – fantastic work. Check out his other works on my site and beyond..
“A reflective statue is found at the bottom of one of Earth’s oceans, having lain there for 1.5 billion years. Since humans have recently developed a time-slowing field and found that one such field cannot function within another, it is suspected that the “Sea Statue” is actually a space traveler within one of these time fields.”