I thought about buying a personal copy of Sederholm's book just for the
incredible illustrations. One place you can find it is at:
Enter Sederholm for author, migmatites for title
Currently there are 8 copies on offer ranging in price from 40 to 60 USD.
This site is an excellent resource for cheap, out of print, geology texts.
We have Eskola's library here. Let me know if you want a copy of some of
the more interesting exchanges on some of his manuscripts. Perhaps I'll see
you in late May ;)