Doctorow is great : This book not so much

Andrew's Brain is about 200 pages. There is one voice - Andrew - talking probably to a mental health professional. The narration is fast flowing , hard to follow and at times it seems pointless. Andrew recounts the death of his first wife, but was that for real?
Once I started mistrusting Andrew's narration, it becomes boring. At least it short! It has some good passages. The master has not lost his touch.