Whether Daniel Pinchbeck came back or not is perhaps the central question raised by this challenging and disturbing book.

This is an important and challenging book that will be essential reading for every student and scholar of prehistory.

Gorman agreed to let a committee review the decision due to concerns that the policy on challenging books was not followed.

I think it's a challenging book in the sense that there's a lot of research and information in it.

Yet whatever its shortcomings, this is also a bold and challenging book, unafraid of inviting controversy.

I highly recommend it as a challenging but rewarding book.

It's always packed, which I hope is a good sign that some people still want to read more challenging books.

This first part of a scholarly and sometimes challenging book contains plenty to set the pavilions buzzing with discussion.

Instead, I received a painful lesson: she needed to take a step backward and read less challenging books.

I wanted to write a challenging book, challenging to myself and to other people.