There's of course a whole range of scientific publications, but any list would either be incomplete or contain some strong bias, both of which wouldn't be great.
So instead only pointers to some special kinds of literature are provided.
The books listed here either have some chapter(s) on hierarchical planning, or are specifically devoted to hierarchical planning. Since there so many versions of books like newer editions that come with different ISBNs etc. only titles and authors are provided, but no bibtex entries (as also publishers might change depending in which version one refers to).
Ordered alphabetically by title.
Artificial Intelligence – A Modern Approach
by S. Russell, P. Norvig, Prentice Hall, 2010.
(Only approx. 10/1300 pages about hierarchical planning, more is spent on non-hierarchical planning.)
Automated Planning and Acting
by M. Ghallab, D. Nau, P. Traverso, Cambridge University Press, 2016.
(Only a very few pages are on hierarchical planning.)
Automated Planning: Theory and Practice
by M. Ghallab, D. Nau, P. Traverso, Morgan Kaufmann, 2004.
(1+/24 chapters are on hierarchical planning.)
Intelligent Planning – A Decomposition and Abstraction Based Approach
by Q. Yang, Springer, 1997.
(The entire book is about hierarchical planning.)
Readings in Planning
by James Allen, James Hendler, and Austin Tate, Morgan Kaufmann, 1990.
(Summarises work on AI planning and reprints key papers from the 1960s to the early 1990s up to and including work on hierarchical partial-order planners such as NOAH, NONLIN and SIPE. See table of contents and index.)
YouTube channel of the HPlan workshop for Hierarchical Planning.
ICAPS summer school 2020 lecture on Learning Hierarchical Models by Héctor Muñoz-Avila.
Invited Talk at ICAPS 2016 on Making Plans for Human Users by Susanne Biundo.
(YouTube) Lecture series by Austin Tate on Planning, also covering Hierarchical Planning. Part of an AI Planning MOOC.
A tutorial on HTN planning by Pascal Bercher and Daniel Höller given at ICAPS 2018. Since this was pre-COVID, it was not recorded, so only the slides are available.
A course on hierarchical planning by Pascal Bercher taught at Ulm University in Winter Term 2018/2019. There are no lecture recordings, but slides are available.
The following list of dissertations might also show how the field develops and grows. The field is (sadly, somehow) still small enough to keep this list manageble! :) Also, dissertations usually don't get cited, so they are just not visble that good. If you know about any thesis not listed here (e.g., your own or any other new one), please drop Pascal an email.