I am keen to get feedback about the book and in particular I would like to hear suggestions. Are there additional topics which should be included? Is there redundant material? More geometry? More modified gravity? Or more classical general relativity? Maybe more cosmology?

On this page I will collect the most common suggestions and topics mentioned in emails.

  • The raising and lowering of indices could be discussed more explicitly and with a few examples to make this part easier to understand.
  • There is a slight jump in the argument on page 84, one might be able to improve this.
  • On page 132 the quantity Δϕ is introduced, see equation (3.80). The meaning of the quantities ϕ+ and ϕ- should be explained better. Figure 3.4 should include these asymptotic angles too. [suggested by various students]