Which book is this?

Pyramids (1989) · Terry Pratchett The Red Pyramid (2010) · Rick Riordan The pyramid principle (1978) · Barbara Minto The Red Pyramid (2012) · Orpheus Collar The Minto pyramid principle (1996) · Barbara Minto Boy of the pyramids (1952) · Ruth Fosdick Jones Inverting the pyramid (2009) · Jonathan Wilson Pyramid (1975) · David Macaulay The pyramid (1966) · William Golding, Penelope Lively Pyramid (1994) · James Putnam