There are 3 books by R. O'Brien on BookOrb. A strong starting point is 108 Wordsearch Puzzles for True Logophiles! (2020). The bibliography below is in publication order, with series grouped in reading order.
Standalone books
Frequently asked questions
How many books has R. O'Brien written?
BookOrb lists 3 books by R. O'Brien.
Where should I start with R. O'Brien?
A good starting point is 108 Wordsearch Puzzles for True Logophiles! (2020).
What is the R. O'Brien books in order list?
In publication order: 1. 108 Wordsearch Puzzles for True Logophiles! (2020), 2. Side Hustle Inventory Two-Page Log Book (2020), 3. Big F*cking Anxiety Wordsearch Puzzle Book (2020).