The main books are expensive first or second hand because people selling them know they can make money on them.

I made a folder with all the main book marks.

The main books he had written in the last decade are:

These are considered the main books of the series and establish the fictional world in which the others are set.

The system was a heavy seller with multiple print runs for the main book.

The series currently has eight main books and two short stories.

His three main books have since been reprinted in India.

Apart from a number of articles, her main books are the following:

Following is a list of the main book parts (as in the third edition).

A number of sub-booklets were subsequently published together with the main book.