For later use ...
Endgame Labyrinths by Steffen Nielsen and Jacob Aagard.
The Art of the Endgame : My Journeys in the Magical World of Endgame Studies by Jan Timman
The Pawn Study Composer’s Manual by Mikhail Zinar
A study apiece by Gerhard Josten
ASymmetry by Michael Schlosser, Martin Minski
HHdbVII (sic) by Harold van der Heijden