Lowboy by John Wray. 

William Heller, aka Lowboy, is on the run after breaking his conditions of release from Bellevue psychiatric hospital.  He travels the subways and subterranean tunnels, off his medication and becoming increasingly psychotic as his paranoid schizophrenia takes over tipping the human need to find patterns in the chaotic into madness.  Wray writes the novel from two points of view, Lowboy's increasingly disturbed perspective and that of Detective Ali Lateef, searching for Lowboy with his mother Yda, aka Violet, their tale too becoming unspooled as Lateef reflects on his altered identity, name changed when his father converted to Islam, and that of Yda.  Very good, but I prefer Tabitha Suzuma

Corbenic by Catherine Fisher

Beautifully written, tender and heartbreaking this is a reworking of the Grail myth through the life of a lost boy running from the hell of his life caring for his alcoholic schizophrenic mother. Cal leaves his mother to live with and work for his uncle but he gets off the train at the wrong stop, a station called Corbenic. In the rain and oncoming storm he stumbles upon a beautiful luxurious country hotel and is treated like a king, but when he denies the evidence of his own senses he sets in motion events which take him on a painful journey of self discovery and atonement. A book I hated to finish and that had me wanting to read the source texts.

Corbenic by Catherine Fisher

Beautifully written, tender and heartbreaking this is a reworking of the Grail myth through the life of a lost boy running from the hell of his life caring for his alcoholic schizophrenic mother. Cal leaves his mother to live with and work for his uncle but he gets off the train at the wrong stop, a station called Corbenic. In the rain and oncoming storm he stumbles upon a beautiful luxurious country hotel and is treated like a king, but when he denies the evidence of his own senses he sets in motion events which take him on a painful journey of self discovery and atonement. A book I hated to finish and that had me wanting to read the source texts.