Amazingg content and I also attended a mock interview, learned a lot.

To describe in one word Fantabulous

I found this book really helpful. The solutions were detailed and the good part is all assumptions were mentioned.

I found this Guesstimate book to be very helpful. All the questions are solved in detail and assumptions are also mentioned.

One of my friends recommended me this book for my Consulting Interview happening this week. After reading & practicing from this book, I have been able to get hold of different type of questions. Thanks I definitely recommend this for Guesstimates.