You can have access to excellent books about important topics for FREE!!!
The most important issues of current days biology and science in general are adressed in reports of the comitees of the National academy. Whyle these are real bookks that can be purchased, you can download the pdf version for FREE from the National Academy Press.

These reports can be considered the framework of future grant openings, research trends, and a collection of the most important issues, that are in the mind of scientists.

So, go on and have a look on the topic Biology .