Reddit mentions of The Keto Diet: The Complete Guide to a High-Fat Diet, with More Than 125 Delectable Recipes and 5 Meal Plans to Shed Weight, Heal Your Body, and Regain Confidence

The Keto Diet - Leanne Vogel - she also has a podcast, if you like them.

Why We Get Fat - Gary Taubes

The Case Against Sugar - Gary Taubes

The Keto Reset Diet - Mark Sisson

The Ketogenic Bible - Jacob Wilson and Ryan Lowery

If you are looking for cookbooks, Maria Emmerich, Kyndra Holley, Carolyn Ketchum, and Amanda Hughes have great stuff. There's also a TON of sites for great keto recipes. Just let me know if you need some.

https://www.amazon.com/gp/aw/d/B06XKKPXM4/ref=mp_s_a_1_3?ie=UTF8&qid=1523453138&sr=8-3&pi=AC_SX236_SY340_FMwebp_QL65&keywords=the+keto+diet

This is a little late, but I just bought this book from Costco two weeks ago and I'm loving it. Its not specifically for pcos, but it does talk about it. Its also not just a cook book. They completely educate you about keto too. Its also not strictly keto too. Its super interesting. I'm not affiliated with the book at all either. Just impulse picked it up at Costco after I saw some of the infographics inside (infographics get me everytime ahaha). Its not specifically PCOS but it's definitely worth the look. link here!

Keto diet. While I’m coming to learn it doesn’t do much (or anything) for cataplexy, it does help astronomically with the daytime sleepiness. You really don’t need to go crazy strict keto and actually produce ketones. I use a more modified approach with more carbs in the evening with as little if none in the first half of the day. I think I saw your bf is vegetarian. You need to be careful with legumes. They’re very high in a type of carb that goes straight to sugar in your system. This diet seriously changed my life. I was diagnosed with Crohns before anything and I could never figure out what my trigger foods where for putting me into what was basically a food coma - it’s carbs. Simple, processed carbs are the worst. There’s an incredible article somewhere with the research behind it. Message me if you want it and I’ll actually look for it. It explains how blood sugar acts on orexin cells in our brain. For those with N, our orexin cells have been severely damaged. It seems like it wouldn’t be too hard of a transition if he already has the discipline to be a vegetarian. This is the best book I’ve found so far: https://www.amazon.com/Keto-Diet-Complete-Delectable-Confidence-ebook/dp/B06XKKPXM4 . It really goes into the details of the different options for those who aren’t looking to the diet to specifically lose weight. And just general amazing information. I don’t actually calculate anything so I wouldn’t say let that intimidate you. No carbs/very little carbs first half of the day and then recipes with some carbs the second half. Stir fry is my best friend. This is also good for a lot of other health issues too. Most people with N have other chronic diseases as well.