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 ### Problem Solving
 - :book: [The Art and Craft of Problem Solving](https://www.goodreads.com/book/show/593458.The_Art_and_Craft_of_Problem_Solving)
 - :book: [How to Solve It: A New Aspect of Mathematical Method](https://www.goodreads.com/book/show/192221.How_to_Solve_It)
-- :book: [To Mock a Mockingbird](https://www.amazon.com/Mock-Mockingbird-Raymond-Smullyan/dp/0192801422?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-d-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=0192801422)
-- :book: [Conceptual Blockbusting: A Guide to Better Ideas](https://www.amazon.com/Conceptual-Blockbusting-Guide-Better-Ideas/dp/0738205370)
-- [Joy of Problem Solving](http://brilliant.org/courses/joy-problem-solving/)
 
 ### Soft Skills
 - :book: [Difficult Conversations](https://www.goodreads.com/book/show/774088.Difficult_Conversations)