Some suggestions:
1. Mark Powell's
Technical Diving: An Introduction
This is a great book for a beginner. It will introduce you to some technical diving gear/notions and has some condensed overview of deco theory as well. I gave my copy away since the material covered was included in other books/sources but it's a great one stop shop to see where you could go with your diving and training.
2. Mark Powell's
Deco for Divers
This book is the go-to primer on decompression theory. Primarily aimed at technical divers, so you don't have to read it right away but if you are interested in theory/physiology of scuba diving it should be a book you read.
3. Steve Lewis'
Six Skills and
Staying Alive
Lewis is another legendary technical/cave diver and now retired instructor, and his books are short and sweet. Six Skills is a bit disjointed (it was built out of his class lectures notes) but full of useful info. If you buy just one get
Staying Alive (in my humble opinion). If his humour and slightly romantic and at times meandering writing style appeal to you, you will love these books. I certainly do.
4. Since you asked about it, Jablonski's
The Fundamentals of Better Diving is included in GUE course packs. I read the older edition, it's a good book, but a bit biased towards one way of doing things (as is typical of GUE). For a beginner, I would actually start with the Recreational Diver 1 manual. It's called
Beginning with the end in Mind and is included with Fundies course packs but you can buy it on the
GUE store. I found it enormously helpful, even though it has some spelling errors here and there and could use a second revision/edition. It is a GUE manual, but has a good overview of practical deco theory and clear explanation of concepts like a balanced rig and how to achieve it which are very relevant to rec divers.
Edit: I should add, these books teach a DIR/GUE configuration, so if you don't have that equipment you may find them frustrating, but they are a good way to figure out if you want to follow that kind of training course.