Just as the LHC has started “Run 2” at 13 TeV, a book has become available about the results from “Run 1” at 8 TeV.

https://books.google.com.au/books?hl=en&lr=&id=i151CQAAQBAJ&oi=fnd&pg=PR5&dq=large+hadron+collider

This book includes a history of high energy particle physics before the LHC including the Tevatron and ill-fated SSC. And then moves on to discuss the history of LHC design and construction and then on to proposed future CERN accelerators including the 100 km long electron-positron collider (Page 53), compare to the 27 km long LHC. Then on to the LHC detectors.

Not all of the book is free-view.

http://www.businessinsider.com/what-is-the-international-linear-collider-2015-6?IR=T

The LHC is the largest machine ever built by humans — here’s the plan for an even bigger one

A 20-mile-long straight line accelerator and it has a good chance of being built in the next few years. That machine is called the International Linear Collider (ILC). Its structure is just as the name suggests: a long tube that collides electrons with their antimatter partners called positrons. The cost is an estimated $7.8 billion compared the $10 billion it took to build the LHC.

The ILC has to be a straight path because electrons lose energy every time they round a corner. The LHC successfully accelerates protons, but an electron racing around its ring would run out of energy in no time.

See also: http://en.wikipedia.org/wiki/International_Linear_Collider

But collision energy would be less. 14 TeV for the LHC vs. 500 GeV for the ILC.