The Disowned Self has 237 pages.
"The Disowned Self" was created in 1960 by writer Nathaniel Branden. It explores the concept of self-esteem and the impact of repressing parts of ourselves on our psychological well-being.
Self-Constitution has 230 pages.
Self - novel - has 331 pages.
Sources of the Self has 624 pages.
My Self Scumbag has 368 pages.
Self Help - novel - has 320 pages.
Self-Efficacy - book - has 604 pages.
The Presentation of Self in Everyday Life has 251 pages.
Kinematic Self-Replicating Machines has 341 pages.
The Power - self-help book - has 272 pages.
If self published it is your choice other wise standard is 150-300 pages.
In the book, Nwoye is never disowned. He runs away from his father to join the missionaries. This may warrant being disowned but I'm pretty sure it never says in the book that he is. He runs away of his own accord.