Our CompTIA A+ Core 1, Core 2, and PenTest+ study guides are available now — in print, as Corydon ebooks in the CertLabz e-reader, and as electronic cheat sheets. More titles releasing every month.
A+ Core 1, A+ Core 2, and PenTest+ together. $135 for all three paperbacks (flat $15 off) or $80 for all three ebooks ($10 instant discount). The discount applies automatically at checkout — no code needed, no expiry.
Corydon ebooks open in our partner platform, CertLabz — a proprietary reader built for technical books, with everything you expect from a modern Kindle-class experience.
Corydon partners with CertLabz on a custom-built reading platform. One account works across both ecosystems — your books, your notes, your labs.
Five colors. Persistent across devices. Export to Notion, Obsidian, or Markdown.
Inline notes anchored to passages. Threaded replies if you're reading with a team.
A sidebar notebook that lives next to the text — with backlinks to chapters.
Tag chapters into topical collections. Cross-book bookmarks for reference.
Full-text search across your entire Corydon library, scoped to title, author, or tag.
Position, highlights, notes, and bookmarks sync in real time — web, iOS, Android.
Highlight any concept — get a plain-English explanation with chapter citations.
Code samples run inline against CertLabz browser labs. No local setup.
Auto-generated from chapter summaries. Spaced repetition built in for cert prep.
Download any book for offline access. Notes sync the moment you reconnect.
Per-chapter progress, time-on-page, and "next 10 minutes" reading suggestions.
See public highlights from other readers (opt-in). Follow authors' margin notes.
Cancel the per-book math. $49/mo billed yearly unlocks the full Corydon library plus the CertLabz reader.