Read a Good Book Lately?

[Oscar]

I received some gift cards from Chapters recently and am itching to spend them on something. Now adays when I buy a book it is meant to be something that I will return to numerous times. For reading pleasure I just borrow from the library.

I have a small reef library now including the 3 volume set of "The Reef Aquarium". Any books out there that you continue to go back to or that have been on your list of purchases to make? Something beyond basic reefing.