Hilton - An Introduction to Homotopy Theory - New paperback or softbac - X555z

Adamson - An Introduction to Field Theory - New paperback or softback - X555z

Saunders - An Introduction to Catastrophe Theory - New paperback or so - X555z

Marker - Model Theory An Introduction - New paperback or softback - X555z

Clemmow - An Introduction to Electromagnetic Theory - New paperback or - X555z

Schmitz - Optimality Theory - An Introduction - New paperback or softb - X555z

Enelow - Spatial Theory of Voting An Introduction - New paperback or - X555z

Dydak - Shape Theory An Introduction - New paperback or softback - X555z