I got this book because it was recommended by a friend on You Tube. It's a big book, and I've only gotten past the first few chapters, but those few chapters contain more information about the life and structure of succulents than most other books on the subject cover in their entirety.It appears to be out of print, but used copies are available at a very low price.For any collector of cacti or succulents, I would recommend this book, since it gives an excellent overview of the needs of these fascinating plants.