Nutritional Science
Chris, there really no one book that will provide a "solid source of trustworthy, up-to-date nutritional science".
The issues are...
1) Outdated Information: Book are essentially 5 years out of date when published.
Current research article provide the most up-to-date data.
As an example, Dr John Ivy's book,
Nutrient Timing, found that ingesting a workout beverage before, during and after training was the most effective method of increasing muscle mass.
New research by Dr Brad Schoenfeld's has determine Ivy's finding to be incorrect. Of greater importance is your daily nutritional eating plan.
2) Different Perspectives: Experts in nutrition have a difference of opinions.
As an example, there is the High Carbohydrate Vs Ketogenic Diet debate with nutritional researchers on both sides with "up-to-date nutritional science" that support their position.
In the High Carbohydrate camp are...
a)
Nutrient Timing: Dr John Ivy
b)
Sports Nutrition Guidebook: Nancy Clark
In the Ketogenic Diet camp are...
a)
The Art and Science ofr Low Carbohydrate Performance: Drs Jeff Volek and Stephen Phinney
b) 'The Effects of Ketogenic Dieting on Body Composition, Strength, Power, and Hormonal Profiles in Resistance Training Males".
This research article just came out (April 2017) in the National Strength and Conditioning's Research Journal.
Drs. Jacob Wilson and other provide fascinating information on how Ketogenic Diet athletes increased muscle mass while maintaining performance.
Another camp is the Intermittent Fasting groups...
a) Lean Gains [
Intermittent fasting diet for fat loss, muscle gain and health] Martin Berkhan examines how to decrease body fat and increase muscle mass with various Intermittent Fasting protocols.
b) The "Intermittent Fasting: Science or Fiction" podcast: Dr John Berardi hour presentation provides "up-to-date nutritional science" on Intermittent Fasting.
c) Other great source on Intermittent Fasting are: Brad Pilon's Eat-Stop-Eat", Dr Mike T. Nelson's "Metabolic Flexibility" [
Metabolic Flexibility | T Nation], etc
Answering Your Question
Chris, I am not trying to be evasive in answering your question. I have a small library of book that have examined all of the various diet mentioned above. I also have a small library of article, as well.
As per Alwyn Cosgrove (Strength Coach), "No one ever got dumber from reading a book" (reading anything).
"There ain't no free lunch."
There are a multitude of good book; those that I mentioned above are good choices.
Reading the divergent perspectives allows you to build a better foundation of knowledge on how to manipulate the various diet protocols as a means of eliciting a positive training effect; increasing sports performance.
Summary
1) There's no one answer (one book).
2) Books are great learning tools for building a foundation. However, like computers they are out of date the day you purchase them.
3) Current Research Article provide the most "up-to-date nutritional science".
4) Diversity Increases Knowledge: Reading and experimentation with the various diet listed above will provide you with a greater overall knowledge about "nutritional science".
5) "Earn While Your Learn": Reading and experimentation are time consuming, so be patient. However, there nothing that surpasses research knowledge combined with practical first hand experience.
Kenny Croxdale