Source: https://www.dlsite.com/books/work/=/product_id/BJ01597024.html

Summary:
「丸呑み道ここに極まる★」
“丸呑み界のトップランナー”タクが贈る「幻想ストマック」名義の同人誌まとめ本「丸吞みの宴」＋「丸吞みの夜会」合本版、登場!
幻の「オリジナル同人誌第一弾」含む「眷属シリーズ」を一気読みできる「丸吞みの宴」（「8作品187ページ」＋「描き下ろし作品8ページ」）＋「丸吞みの夜会」（「あなたの身体」シリーズ一挙掲載＋α「9作品197ページ」＋「描き下ろし作品8ページ」）を収録!!
合計400ページを超えるの豪華フルカラー版です!!
特装版には描き下ろしカラー作品10Pと未掲載イラスト集、作者本人による作品解説を特別収録★
超ボリューム特別版となります!

Translation (MTL):

"The Ultimate in Whole-Swallowing Action!"
From Taku—a leading figure in the whole-swallowing genre—comes a combined edition of the *Gensou Stomach* circle's doujinshi collections: *Banquet of Whole-Swallowing* and *Soiree of Whole-Swallowing*!
This volume lets you binge-read the "Retinue Series" (including the rare "Original Doujinshi Vol. 1") from *Banquet of Whole-Swallowing* (8 works/187 pages + 8 pages of new art), alongside *Soiree of Whole-Swallowing* (featuring the complete "Your Body" series plus extras—9 works/197 pages + 8 pages of new art)!!
It is a lavish, full-color edition spanning over 400 pages in total!!
The special edition includes exclusive bonus content: 10 pages of new color artwork, a collection of previously unpublished illustrations, and commentary on the works by the author themselves★
A massive, special-volume release!

An Abbreviated Table of Contents (Because I'm Lazy):
Pages 3-286, The Titular Banquet of Vore & Soiree of Vore Collection
Pages 287-302, Other Taku doujinshi
Pages 393-401, a "Soiree" doujinshi (The "I want Your Body" Succubus) featuring said girl in her Flesh Wall Garden.
Pages 403-412, CockVoreサキュバス The collection's exclusive work.
Pages 414-434, Illustrations by Taku
Pages 436-444, Author's Commentary
Pages 445-450, Back End