My blog on the Tuesday Tips day has a series on Kindle-ization and next up is the how-to re: my experiences formatting nonfiction. http://www.AmyShojai.com and check out Tuesday posts.
I recommend the full URL rather than hot-links because not all platforms support hotlinks--and your reader will be frustrated being unable to find/access the recommended link. Kindle-for-PC supports hotlinks but the reader itself doesn't. *shrug* It may in the future but you'll still have some readers that are not able to do so. Give readers every opportunity to access recommended info.
I recommend the full URL rather than hot-links because not all platforms support hotlinks--and your reader will be frustrated being unable to find/access the recommended link. Kindle-for-PC supports hotlinks but the reader itself doesn't. *shrug* It may in the future but you'll still have some readers that are not able to do so. Give readers every opportunity to access recommended info.