PHD Comics (Piled Higher & Deeper) publishes notices for two different book releases in posts dated Aug. 31, 2023, and Jan. 15, 2021. In the 2023 post, the comic’s page highlights a book titled “Oliver’s Great Big Universe!” and indicates it is a new book announcement, with the item originally published on Aug. 31, 2023. In the earlier 2021 post, PHD Comics similarly presents a new book announcement titled “Out of Your Mind!” and notes that it was originally published on Jan. 15, 2021. Both sources appear to be brief, page-level announcements on the PHD Comics website under Jorge Cham’s “Piled Higher & Deeper” strip branding. The provided material does not include plot details, author attribution beyond the site branding, pricing, or purchasing links, but it does establish that PHD Comics uses comic-page posts to publicize book titles and the original publication dates for each announcement.