The second volume includes switches that are not so well known. The photos are really detailed and the data is almost impossible to find elsewhere. The English grammar is still a bit off but still much better than the previous one.
If you enjoyed the first volume then you'll surely like this one. This didn't come with a tester like the first but the book is considerably larger and includes many more switches. The graphics and text look amazing. This is a really nice addition to any mech keyboard collection. Small makers like Romly are what make this community so awesome.