Can be found online at Girl Genius Online.
This is a hi-res scan from pages 212-213 of the Omnibus Volume 1 Agatha Awakens. It provides a legibility to the bookshelf titles not available elsewhere. It is used for documenting Philbert's authorship .
Appears on these pages
Philbert Olio (or possibly Oleo) is the (In)famous (and unctuous?) author of "The Heterodyne...