stan lee's rare riftworld hard back copy

there was 552 made and 500 for the general public and the hard back cover was blue in colour.
my swali is, i have the red cover version of the book and where the limited edition number goes it has FF in place and is still hand signed. i have little information on this i have been told it came from stan lee's archives in LA, could anyone please give me any zaidi information. thank you.