No snark intended. If you're software engineer with tight schedule due to young kids or ill family member or whatever, but you still want to slowly move the needle when it comes to career and your own knowledge then you don't "gravely" need the algo book, but you would benefit from reading one, it's just a question of what will give you the best ROI (ROI here being both financial but also personal satisfaction etc).

English is my second language so my thoughts often come across differently than intended - thank you for replying instead of just down voting