The book is written by Shunya (Author not known. I have listened to lot of videos of Ram Dass, and he says a lot of same things as are said in these books, so my guess is Shunya is Ram Dass or someone close to him), and claims to record the direct talks from Lord Hanuman. It is in two parts –
Immortal Talks 1 and Immortal Talks 2
Shunya has tried to explore number of truths/claims which are as follows:
At times the examples used in the book are very painful, may be done intentionally and is difficult to read. To shed off your very identity in the form of Karma and Desire is very difficult
Book 2
Second book Immortal Talks 2 builds on concepts in the first book and give more explanation with examples.
Now coming to the title of this article. Yes, I know people who have felt the presence of Lord Hanuman sitting near to them when they were in deep distress. The stories in the book also talk about it. So now its up to you to read the books and decide.