John A. Townsend (Houston; Google Scholar), Federal Tax Procedure (2023 Practitioner Ed.) (1,603 pages):

Federal Tax Procedure is a book originally prepared for a course on Tax Procedure taught by Adjunct Professor Townsend at the University of Houston School of Law (through the Fall of 2015). The book is updated annually in August. The book and related materials contain text discussion, relevant Code Section citations, and certain cases designed to encourage students to think about the Tax Procedure process. The book is in electronic format (Adobe Acrobat PDF format) and is in two versions – (1) a Student Edition (no footnotes but with key statutes and cases in the text); and (2) a Practitioner Edition (same as Student Edition but including extensive footnotes). This is the 2023 Practitioner Edition. Both versions are available on Mr. Townsend's SSRN web page. 

Mr. Townsend's practice is to update both Editions once a year in August to permit the book to be used in the following academic year. Updates and additional matters related to the book may be found on Mr. Townsend's Federal Tax Procedure Blog.

Both Editions have substantially more pages than the 2023 editions principally because I changed the fonts as follows: In both editions, the text uses Century Font Size 13 (rather than last year’s edition using Times New Roman with Size 12); and (ii) in the Practitioner edition footnotes are Century Font Size 11 (rather than last year’s edition using (Times New Roman Size 10).