JAMB has recommended 2 Compulsory Novels that candidates are to read before their exams, starting 6th May, 2017. The 2 Novels are;
1. "In Dependence" by Sarah Ladipo Manyika for UTME Candidates
2. "The Last Days at Forcados High School" by A.H. Mohammed for Direct Entry Candidates
According to the instructions, candidates will be tested on these 2 novels in Use of English, which is compulsory for every candidate, regardless of the course you intend to study in school.
A lot more JAMBites are familiar with OPTION 2 above, being that it was the only Novel that was used in testing during the 2016 UTME. OPTION 1 however, is a newly introduced Novel for 2017.
While a lot more students are only interested in buying registration forms, they neglect to look deep into other instructions, which may be critical to the success of their exams in May. 
From the instructions released by JAMB, it is clear that "In Dependence" ought to be for UTME candidates alone, while "The Last Days at Forcados High School" will be used by Direct Entry Candidates.
If you go by the instruction stated above, this simply means that UTME candidates will get questions asked from the book "In Dependence", while Direct Entry will get questions from "The Last Days at Forcados High School".
PLEASE NOTE: THIS IS AN EXAM
In as much as, JAMB has clearly stated and differentiated between the 2 texts, THIS IS AN EXAMINATION and JAMB is free to test you from any source they deem fit.
Whether you are a UTME student or a Direct Entry Student, we, will advise that you get yourself acquainted with BOTH NOVELS. There is no knowledge lost with doing so.
Please go out of your way to adequately prepare for this exam by Studying both novels and expecting questions from either of them, whether you are a UTME or Direct Entry Student.
The novels are not too voluminous and the stories are interesting for you to read within the next 2 months. You should be able to read and understand the entire story of both novels.
After taking our FREE Online JAMB/POST-UTME CBT practice test, you can download JAMB/POST-UTME 2017/2018 offline CBT software FREE to practice more past questions here. 

See

A Summary of JAMB Text: The Last Days at Forcados High School
Jamb 2016: Possible Questions From The Last Days at Forcados
There should be no boundaries to what you should study. Ensure you cover the jamb utme 2016-2018 syllabus online [all subjects] for your subjects and read extensively.
We will be creating other threads as per revision for the Novel "In Dependence", as time progresses so ensure you visit the www.jambcbttest.com regularly daily.
If you have issues about the novel that you feel Admin and other students can help you with, don't hesitate to post it as a comment, then check and wait patiently for a reply.