35101 Total Warfare (seconds)

Practically identical to the CGL book other than the cover, can confirm. Extremely good value. Already had the PDF and didn't want to pay for the whole book again, so this was perfect.

As for the actual contents of the book, it contains very dense and comprehensive coverage of the classic battletech rules, including mechs, vehicles, aerospace and infantry/battle armour. Basically the only book you need to play combined arms. Also contains a painting/modelling guide, scenarios, random unit tables... Very happy with this purchase!