Despite such prevalence in modern-day spoken English, these colloquial usages of like rarely appear in writing (unless the writer is deliberately trying to replicate colloquial dialogue) and they have long been stigmatized in formal speech or in high cultural or high social settings. Furthermore, this use of like seems to appear most commonly, in particular, among natively English-speaking children and adolescents , while less so, or not at all, among middle-aged or elderly adults. One suggested explanation for this phenomenon is the argument that younger English speakers are still developing their linguistic competence , and, metalinguistically wishing to express ideas without sounding too confident, certain, or assertive, use like to fulfill this purpose. 
When you integrate quotations in this way, you do not use any special punctuation. Instead, you should punctuate the sentence just as you would if all of the words were your own. No punctuation is needed in the sentences above in part because the sentences do not follow the pattern explained under number 1 and 2 above: there is not a complete sentence in front of the quotations, and a word such as "says," "said," or "asks" does not appear directly in front of the quoted words.
The book doesn't specify if the monster was created by one man or several or how he was brought to life. I think we can safely guess that the monster was brought to life using electricity because it has such an influence on Victor. SPOILER ALERT. I would also say that is safe to say that the monster was probably created using more than one man because later on Victor tears apart/destroys the monster's companion before he completes her creation. These are just my thoughts and if anyone has anything else they would like to add please comment