If you're a Software Engineer I suggest to use it to get some Network Certification. If you're into SRE, I would suggest go AWS certificate route. Why? Becaus

If you're a Software Engineer I suggest to use it to get some Network Certification. If you're into SRE, I would suggest go AWS certificate route. Why? Because ebooks you can buy or borrow from library easily or read online. But getting certs you need to pay with real cash. Learning for these certs usually leads to down the road opportunity and you get discount on next certs etc.