Hey everyone! So I've got a few hundred dollars saved up, and I'm looking to buy a few different books.
At the moment, I'm looking to buy at least two books, one on primates and the other on hoofed mammals, and posssssibly one on carnivores or marine mammals if I've got enough left over. I'm definitely eyeing a volume of the Handbook of the Mammals of the World, but they're just soooo expensive. I know the more I spend on one book, the fewer books I'll be able to buy, but I want to make sure I can get a nice blend of quality and quantity here.
Recently I've become particularly more fascinated with primates, and I would like a book that has both breadth and depth, has lots of text but many illustrations and figures that complement the text, and isn't too pricey. I've bookmarked a couple online but don't know which would be my best bet, especially considering the reviews for some either contradict one another, are very sparse, or absent entirely.

Is there a book out there that covers all species (I know the number of officially recognized species is still being debated and is always changing, but I'm sure you know what I mean) and has accounts for each that are relatively detailed but not too technical?
I ask because I recently bought
The Living Elephants by Raman Sukumar, which I heard was the authoritative piece of literature on elephants. I can't really say anything bad about it, because the information it provides on proboscidean evolution, elephants' social life and conservation of elephants is astounding! But since I am still essentially a biology novice, there is quite a bit of information - such as that on genetics, mathematical functions/statistics, and the chemistry behind certain bodily functions, etc. - that I cannot yet appreciate, let alone understand.
So I am looking for something that is a bit more than just a field guide - something that provides me with more than just help identifying species, and a good amount of new and exciting information - but something that I don't have to be a complete expert to understand. As an aspiring biologist, I of course would someday like to understand the more complex topics I currently shy away from reading about, but obviously I'm not going to spend all of my money on books I can barely read right now, you know?
As far as the hoofed animal book goes, hoofed animals are my favorites, and Volume 2 of the Handbook of the Mammals of the World is definitely at the top of my list. But I know a number of you have purchased HBW or HMW volumes in the past, so I'd love to know what you guys think of the books and whether they match the description of what I'm looking for. If so, I've got no problem spending the $180 or so needed to buy one. I just want to know if that's my best option. The same goes for the carnivore and marine mammal books, too.
The bottom line is that I would like to get the most informative books out there without venturing into expert territory, if that makes any sense.
I'm also thinking of buying a single, more specialized book and just getting several more general ones, but I'm obviously still undecided.

Any help with this dilemma would be greatly appreciated, haha.