I stumbled into this book in the public library a few weeks ago and I'm certainly going to buy it for further reference in the future. It's an eye opener of the best kind! I'm glad that this book is available in English too, so that it will reach more people.
First, Hans ten Dam describes reincarnation beliefs in several spiritual and religious settings incl. the three monotheistic religions, hinduism, buddhism, nature religions and recently developed beliefs like theosophy and anthroposophy. The next part of the book contains experiences with reincarnation from different points of view (children's memories, spontaneous and induced regressions, paranormal activities (e.g. through mediums) etc.) Ten Dam discusses many questions that may arise, like: the probability of other explanations for the past life experiences, whether we can reincarnate in animal bodies, the way karma works, how experiences and different beliefs correspond etc.
The author read a vast number of books on the subject and rates most of them in the text and in the literature list in the back of the book. This is very useful for further reading, because many books that contain sheer nonsense can be omitted immediately.
Although Hans ten Dam, a regression therapist himself, is a firm 'believer', he looks at other possibilities to explain memories of past lifes (false memories, fraud, déjà vu etc.) in a very serious way. Also he dares to criticize religious beliefs and work of other authors in the field (often accompanied by a dry sense of humour that made me role on the floor laughing ;-) Especially the chapter on new age beliefs is great in that regard).
If you're interested in reincarnation - either from a professional or from a layman's point of view (and obviously you are, because otherwise you wouldn't be reading this) - I would certainly recommend this book to you. Although the first chapters may seem a bit 'dry', you most probably won't be disappointed :-)