Reading the Edward Tuft book about data analysis in politics and policy
Edward Tuft is one of the gurus of Data Analysis visualization , and in this chapter  he show in a very didactic and clear way the importance of logarithmic transformation for data of naturally occurring counts.
The importance of logarithmic transformation
This is a very clear and didactic explanation of the importance of logarithmic transformation that anyone on doing data analysis in natural sciences or epidemiology must read.
And a very important point is to raise the point that regression analysis of a model DOES NOT TEST the relationship but SHOWS the proportionality GIVEN THE MODEL BEING TRUE
I truly recommend reading this even it is a very old book (ed. 1976).
Final note: Remember to add 1 to your data before log transform in order to avoid log(0). Don't do that if you have negative number ;-). Other option is to add a small quantity to all your 0s