I.E Irodov Problems in Physics

Shoku Z

How tough is that book?I have heard a lot about it from my friends.They say it has the toughest physics problems.Is it really that tough?I've seen that book,looks scary but have never opened it cuz I fear I wont be able to solve them and I will get humiliated in front of others.I am thinking about buying it but I have a lot of physics books already.And is it tougher than Klepnner-Kolenkow's An Introduction to Mechanics?It has the hardest problems I've ever seen.