While the preamble said something along the line of "these books are valuable for 'enterprise' dev situation', I find that a lot of ideas from those books are fully applicable to startups/hot-tech-companies.

Release It! => applicable

Continuous Delivery => applicable

Effective Java => absolutely IF you use Java (see other 'effective' series such as Effective C#, Effective C++ [_the_ grandfather], Effective JavaScript)

Patterns of Enterprise Application Architecture => Guess where Rails come from? (hint: DHH name is also mentioned somewhere in the book)