Sprints and Relays book

I currently own the 4th edition of Sprints and Relays published in 1995. Are there any earlier editions or subsequent editions worth purchasing? What is the latest edition like?

The one before and after are nice additions to any library.

I am still trying to find the book of Mach - what is the name of the book? Where to order the book? Can it be used together with the books of Charlie? Do they recommend the same training methods?

Number Two?

I am still looking for machs too…