In the main, I find myself agreeing with the earlier reviewer. The paucity of exercises is NOT a weakness of this book. On the contrary, the exercises in the book are carefully chosen and serve to illustrate and reinforce the theory really well. It is really well written: simple and lucid. It is a pity that one must not hold out high hopes for more books on algebra or number theory written by this author who appears to be an analyst. I am grateful for this contribution from him to my mathematical education at any rate.