Advanced-undegrad/junior post-grad books on QM mathematics

[WWCY]

Hi all,

I was wondering if I could get recommendations for texts/notes that delve deeper into the mathematics of QM as well as QM itself than what one finds in standard "Intro to QM" texts. Ideally it'd be presented in the style of Nielsen and Chuang's Quantum Computation book, but in greater depth. An introduction to QFT at the end would be a bonus.

If it helps, I'm looking for material that will help me better understand theoretical QM papers.

Many thanks in advance.

PS texts/notes like these https://www.mat.univie.ac.at/~gerald/ftp/book-schroe/schroe.pdf are much too difficult for me.

 

[Demystifier]

https://arxiv.org/abs/quant-ph/9907069

 

[DarMM]

"An Introduction to Quantum Theory" by Keith Hannabuss perhaps?

 

[WWCY]

Cheers for the recommendations, do these go through topics like POVMs and basic functional analysis/operator theory?