These are personal recommendations from Dr. Harvey Motulsky , president of GraphPad Software , creators of intuitive software to simplify graphing, curve fitting and statistics.
Separate pages link to resources for learning about pharmacology analyses and nonlinear regression .
The appeal of online books is that they are free and convenient for reference. A New View of Statistics by Will G Hopkins. This is an impressive work that clearly explains many statistical concepts, basic and advanced. It explains things for biologists, with almost no math. The examples are from sports physiology, but any biologist will appreciate the clear illustrated explanations.